邪恶八进制信息安全团队技术讨论组 » 常用数据库类{ Database Security } » [转载]Transact SQL 常用语句以及函数 [查看完整版本]

ring04h 2006-4-4 13:00

[转载]Transact SQL 常用语句以及函数

<P>信息来源: CSDN</P>
<P><SPAN style="COLOR: #000000">Transact SQL</SPAN><SPAN style="COLOR: #008080">语句功能<BR></SPAN><SPAN style="COLOR: #008080">========================================================================<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">数据操作</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #0000ff">SELECT</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">从数据库表中检索数据行和列</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">INSERT</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">向数据库表添加新数据行</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">DELETE</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">从数据库表中删除数据行</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">UPDATE</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">更新数据库表中的数据</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">数据定义</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #0000ff">CREATE</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">TABLE</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">创建一个数据库表</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">DROP</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">TABLE</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">从数据库中删除表</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">ALTER</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">TABLE</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">修改数据库表结构</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">CREATE</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">VIEW</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">创建一个视图</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">DROP</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">VIEW</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">从数据库中删除视图</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">CREATE</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">INDEX</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">为数据库表创建一个索引</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">DROP</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">INDEX</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">从数据库中删除索引</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">CREATE</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">PROCEDURE</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">创建一个存储过程</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">DROP</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">PROCEDURE</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">从数据库中删除存储过程</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">CREATE</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">TRIGGER</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">创建一个触发器</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">DROP</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">TRIGGER</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">从数据库中删除触发器</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">CREATE</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">SCHEMA</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">向数据库添加一个新模式</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">DROP</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">SCHEMA</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">从数据库中删除一个模式</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">CREATE</SPAN><SPAN style="COLOR: #000000">DOMAIN</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">创建一个数据值域</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">ALTER</SPAN><SPAN style="COLOR: #000000">DOMAIN</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">改变域定义</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">DROP</SPAN><SPAN style="COLOR: #000000">DOMAIN</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">从数据库中删除一个域</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">数据控制</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #0000ff">GRANT</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">授予用户访问权限</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">DENY</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">拒绝用户访问</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">REVOKE</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">解除用户访问权限</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">事务控制</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #0000ff">COMMIT</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">结束当前事务</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">ROLLBACK</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">中止当前事务</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">SET</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">TRANSACTION</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">定义当前事务数据访问特征</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">程序化SQL</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #0000ff">DECLARE</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">为查询设定游标</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　EXPLAN</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">为查询描述数据访问计划</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">OPEN</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">检索查询结果打开一个游标</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">FETCH</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">检索一行查询结果</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">CLOSE</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">关闭游标</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">PREPARE</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">为动态执行准备SQL语句</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">EXECUTE</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">动态地执行SQL语句</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　DESCRIBE</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">描述准备好的查询　　</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-局部变量</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #0000ff">declare</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008000">@id</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #000000">char</SPAN><SPAN style="COLOR: #000000">(</SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">10</SPAN><SPAN style="COLOR: #000000">)<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">set@id='10010001'</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">select</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008000">@id</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #ff0000">'</SPAN><SPAN style="COLOR: #ff0000">10010001</SPAN><SPAN style="COLOR: #ff0000">'</SPAN><SPAN style="COLOR: #000000">　　<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-全局变量</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-必须以@@开头　　</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">IFELSE</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #0000ff">declare</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008000">@x</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #000000">int</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008000">@y</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #000000">int</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008000">@z</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #000000">int</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #0000ff">select</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008000">@x</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">1</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008000">@y</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">2</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008000">@z</SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">3</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #0000ff">if</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008000">@x</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #808080">></SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008000">@y</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #0000ff">print</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #ff0000">'</SPAN><SPAN style="COLOR: #ff0000">x>y</SPAN><SPAN style="COLOR: #ff0000">'</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">打印字符串'x>y'</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">else</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">if</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008000">@y</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #808080">></SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008000">@z</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #0000ff">print</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #ff0000">'</SPAN><SPAN style="COLOR: #ff0000">y>z</SPAN><SPAN style="COLOR: #ff0000">'</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #0000ff">else</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">print</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #ff0000">'</SPAN><SPAN style="COLOR: #ff0000">z>y</SPAN><SPAN style="COLOR: #ff0000">'</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">CASE</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">use</SPAN><SPAN style="COLOR: #000000">pangu<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #0000ff">update</SPAN><SPAN style="COLOR: #000000">employee<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #0000ff">set</SPAN><SPAN style="COLOR: #000000">e_wage</SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #ff00ff">case</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #0000ff">when</SPAN><SPAN style="COLOR: #000000">job_level</SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="COLOR: #000000">’</SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">1</SPAN><SPAN style="COLOR: #000000">’</SPAN><SPAN style="COLOR: #0000ff">then</SPAN><SPAN style="COLOR: #000000">e_wage</SPAN><SPAN style="COLOR: #808080">*</SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">1.08</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #0000ff">when</SPAN><SPAN style="COLOR: #000000">job_level</SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="COLOR: #000000">’</SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">2</SPAN><SPAN style="COLOR: #000000">’</SPAN><SPAN style="COLOR: #0000ff">then</SPAN><SPAN style="COLOR: #000000">e_wage</SPAN><SPAN style="COLOR: #808080">*</SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">1.07</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #0000ff">when</SPAN><SPAN style="COLOR: #000000">job_level</SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="COLOR: #000000">’</SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">3</SPAN><SPAN style="COLOR: #000000">’</SPAN><SPAN style="COLOR: #0000ff">then</SPAN><SPAN style="COLOR: #000000">e_wage</SPAN><SPAN style="COLOR: #808080">*</SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">1.06</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #0000ff">else</SPAN><SPAN style="COLOR: #000000">e_wage</SPAN><SPAN style="COLOR: #808080">*</SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">1.05</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #0000ff">end</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">WHILECONTINUEBREAK</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">declare</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008000">@x</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #000000">int</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008000">@y</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #000000">int</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008000">@c</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #000000">int</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #0000ff">select</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008000">@x</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">1</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008000">@y</SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">1</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #0000ff">while</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008000">@x</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #808080"><</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">3</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #0000ff">begin</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #0000ff">print</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008000">@x</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">打印变量x的值</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">while</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008000">@y</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #808080"><</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">3</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #0000ff">begin</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #0000ff">select</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008000">@c</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">100</SPAN><SPAN style="COLOR: #808080">*</SPAN><SPAN style="COLOR: #008000">@x</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #808080">+</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008000">@y</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #0000ff">print</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008000">@c</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">打印变量c的值</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　　　</SPAN><SPAN style="COLOR: #0000ff">select</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008000">@y</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008000">@y</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #808080">+</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">1</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #0000ff">end</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #0000ff">select</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008000">@x</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008000">@x</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #808080">+</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">1</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #0000ff">select</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008000">@y</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">1</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #0000ff">end</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">WAITFOR</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">例等待1小时2分零3秒后才执行SELECT语句</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #0000ff">waitfor</SPAN><SPAN style="COLOR: #000000">delay’</SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">01</SPAN><SPAN style="COLOR: #000000">:</SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">02</SPAN><SPAN style="COLOR: #000000">:</SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">03</SPAN><SPAN style="COLOR: #000000">’<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　　　</SPAN><SPAN style="COLOR: #0000ff">select</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #808080">*</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">from</SPAN><SPAN style="COLOR: #000000">employee<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">例等到晚上11点零8分后才执行SELECT语句</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　</SPAN><SPAN style="COLOR: #0000ff">waitfor</SPAN><SPAN style="COLOR: #000000">time’</SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">23</SPAN><SPAN style="COLOR: #000000">:</SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">08</SPAN><SPAN style="COLOR: #000000">:</SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">00</SPAN><SPAN style="COLOR: #000000">’<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #0000ff">SELECT</SPAN><SPAN style="COLOR: #000000">　　<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #0000ff">select</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #808080">*</SPAN><SPAN style="COLOR: #000000">(列名)</SPAN><SPAN style="COLOR: #0000ff">from</SPAN><SPAN style="COLOR: #000000">table_name(表名)</SPAN><SPAN style="COLOR: #0000ff">where</SPAN><SPAN style="COLOR: #000000">column_nameoperatorvalueex宿主)<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　</SPAN><SPAN style="COLOR: #0000ff">select</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #808080">*</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">from</SPAN><SPAN style="COLOR: #000000">stock_information</SPAN><SPAN style="COLOR: #0000ff">where</SPAN><SPAN style="COLOR: #000000">stockid</SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #ff00ff">str</SPAN><SPAN style="COLOR: #000000">(nid)<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　stockname</SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #ff0000">'</SPAN><SPAN style="COLOR: #ff0000">str_name</SPAN><SPAN style="COLOR: #ff0000">'</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　stockname</SPAN><SPAN style="COLOR: #808080">like</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #ff0000">'</SPAN><SPAN style="COLOR: #ff0000">%findthis%</SPAN><SPAN style="COLOR: #ff0000">'</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　stockname</SPAN><SPAN style="COLOR: #808080">like</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #ff0000">'</SPAN><SPAN style="COLOR: #ff0000">[a-zA-Z]%</SPAN><SPAN style="COLOR: #ff0000">'</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-------([]指定值的范围)</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　stockname</SPAN><SPAN style="COLOR: #808080">like</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #ff0000">'</SPAN><SPAN style="COLOR: #ff0000">[^F-M]%</SPAN><SPAN style="COLOR: #ff0000">'</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-------(^排除指定范围)</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-------只能在使用like关键字的where子句中使用通配符)</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　</SPAN><SPAN style="COLOR: #808080">or</SPAN><SPAN style="COLOR: #000000">stockpath</SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #ff0000">'</SPAN><SPAN style="COLOR: #ff0000">stock_path</SPAN><SPAN style="COLOR: #ff0000">'</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　</SPAN><SPAN style="COLOR: #808080">or</SPAN><SPAN style="COLOR: #000000">stocknumber</SPAN><SPAN style="COLOR: #808080"><</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">1000</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　</SPAN><SPAN style="COLOR: #808080">and</SPAN><SPAN style="COLOR: #000000">stockindex</SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">24</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　</SPAN><SPAN style="COLOR: #808080">not</SPAN><SPAN style="COLOR: #000000">stocksex</SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #ff0000">'</SPAN><SPAN style="COLOR: #ff0000">man</SPAN><SPAN style="COLOR: #ff0000">'</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　stocknumber</SPAN><SPAN style="COLOR: #808080">between</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">20</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #808080">and</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">100</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　stocknumber</SPAN><SPAN style="COLOR: #808080">in</SPAN><SPAN style="COLOR: #000000">(</SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">10</SPAN><SPAN style="COLOR: #000000">,</SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">20</SPAN><SPAN style="COLOR: #000000">,</SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">30</SPAN><SPAN style="COLOR: #000000">)<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　</SPAN><SPAN style="COLOR: #0000ff">order</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">by</SPAN><SPAN style="COLOR: #000000">stockid</SPAN><SPAN style="COLOR: #0000ff">desc</SPAN><SPAN style="COLOR: #000000">(</SPAN><SPAN style="COLOR: #0000ff">asc</SPAN><SPAN style="COLOR: #000000">)</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-------排序，desc-降序，asc-升序</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　</SPAN><SPAN style="COLOR: #0000ff">order</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">by</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">1</SPAN><SPAN style="COLOR: #000000">,</SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">2</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-------by列号</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　stockname</SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="COLOR: #000000">(</SPAN><SPAN style="COLOR: #0000ff">select</SPAN><SPAN style="COLOR: #000000">stockname</SPAN><SPAN style="COLOR: #0000ff">from</SPAN><SPAN style="COLOR: #000000">stock_information</SPAN><SPAN style="COLOR: #0000ff">where</SPAN><SPAN style="COLOR: #000000">stockid</SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">4</SPAN><SPAN style="COLOR: #000000">)<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-------子查询</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-------除非能确保内层select只返回一个行的值</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-------否则应在外层where子句中用一个in限定符</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　</SPAN><SPAN style="COLOR: #0000ff">select</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">distinct</SPAN><SPAN style="COLOR: #000000">column_nameformtable_name<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-------distinct指定检索独有的列值，不重复</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　</SPAN><SPAN style="COLOR: #0000ff">select</SPAN><SPAN style="COLOR: #000000">stocknumber,"stocknumber</SPAN><SPAN style="COLOR: #808080">+</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">10</SPAN><SPAN style="COLOR: #000000">"</SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="COLOR: #000000">stocknumber</SPAN><SPAN style="COLOR: #808080">+</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">10</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">from</SPAN><SPAN style="COLOR: #000000">table_name<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　</SPAN><SPAN style="COLOR: #0000ff">select</SPAN><SPAN style="COLOR: #000000">stockname,"stocknumber"</SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #ff00ff">count</SPAN><SPAN style="COLOR: #000000">(</SPAN><SPAN style="COLOR: #808080">*</SPAN><SPAN style="COLOR: #000000">)</SPAN><SPAN style="COLOR: #0000ff">from</SPAN><SPAN style="COLOR: #000000">table_name</SPAN><SPAN style="COLOR: #0000ff">group</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">by</SPAN><SPAN style="COLOR: #000000">stockname<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-------groupby将表按行分组,指定列中有相同的值</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　</SPAN><SPAN style="COLOR: #0000ff">having</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #ff00ff">count</SPAN><SPAN style="COLOR: #000000">(</SPAN><SPAN style="COLOR: #808080">*</SPAN><SPAN style="COLOR: #000000">)</SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">2</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-------having选定指定的组</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #0000ff">select</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #808080">*</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　</SPAN><SPAN style="COLOR: #0000ff">from</SPAN><SPAN style="COLOR: #000000">table1,table2<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #0000ff">where</SPAN><SPAN style="COLOR: #000000">table1.id</SPAN><SPAN style="COLOR: #808080">*=</SPAN><SPAN style="COLOR: #000000">table2.id</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">------左外部连接，table1中有的而table2中没有得以null表示</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　table1.id</SPAN><SPAN style="COLOR: #808080">=*</SPAN><SPAN style="COLOR: #000000">table2.id</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">------右外部连接</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　</SPAN><SPAN style="COLOR: #0000ff">select</SPAN><SPAN style="COLOR: #000000">stockname</SPAN><SPAN style="COLOR: #0000ff">from</SPAN><SPAN style="COLOR: #000000">table1<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　　　</SPAN><SPAN style="COLOR: #0000ff">union</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #ff0000">[</SPAN><SPAN style="COLOR: #ff0000">all</SPAN><SPAN style="COLOR: #ff0000">]</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">------union合并查询结果集，all-保留重复行</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　　　</SPAN><SPAN style="COLOR: #0000ff">select</SPAN><SPAN style="COLOR: #000000">stockname</SPAN><SPAN style="COLOR: #0000ff">from</SPAN><SPAN style="COLOR: #000000">table2　<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #0000ff">insert</SPAN><SPAN style="COLOR: #000000">　<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #0000ff">insert</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">into</SPAN><SPAN style="COLOR: #000000">table_name(Stock_name,Stock_number)value("xxx","xxxx"<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　value(</SPAN><SPAN style="COLOR: #0000ff">select</SPAN><SPAN style="COLOR: #000000">Stockname,Stocknumber</SPAN><SPAN style="COLOR: #0000ff">from</SPAN><SPAN style="COLOR: #000000">Stock_table2)<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-----value为select语句　　</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #0000ff">update</SPAN><SPAN style="COLOR: #000000">　　<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #0000ff">update</SPAN><SPAN style="COLOR: #000000">table_name</SPAN><SPAN style="COLOR: #0000ff">set</SPAN><SPAN style="COLOR: #000000">Stockname</SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="COLOR: #000000">"xxx"</SPAN><SPAN style="COLOR: #ff0000">[</SPAN><SPAN style="COLOR: #ff0000">whereStockid=3</SPAN><SPAN style="COLOR: #ff0000">]</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　Stockname</SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">default</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　Stockname</SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">null</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　Stocknumber</SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="COLOR: #000000">Stockname</SPAN><SPAN style="COLOR: #808080">+</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">4</SPAN><SPAN style="COLOR: #000000">　　<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #0000ff">delete</SPAN><SPAN style="COLOR: #000000">　　<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #0000ff">delete</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">from</SPAN><SPAN style="COLOR: #000000">table_name</SPAN><SPAN style="COLOR: #0000ff">where</SPAN><SPAN style="COLOR: #000000">Stockid</SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">3</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #0000ff">truncate</SPAN><SPAN style="COLOR: #000000">table_name</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-------删除表中所有行，仍保持表的完整性</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #0000ff">drop</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">table</SPAN><SPAN style="COLOR: #000000">table_name</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-------完全删除表　</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #0000ff">alter</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">table</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">------修改数据库表结构　　</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #0000ff">alter</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">table</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">database</SPAN><SPAN style="COLOR: #000000">.owner.table_name</SPAN><SPAN style="COLOR: #0000ff">add</SPAN><SPAN style="COLOR: #000000">column_name</SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #000000">char</SPAN><SPAN style="COLOR: #000000">(</SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">2</SPAN><SPAN style="COLOR: #000000">)</SPAN><SPAN style="COLOR: #0000ff">null</SPAN><SPAN style="COLOR: #000000"><IMG alt="" src="http://www.cnblogs.com/Images/dot.gif">..<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　sp_helptable_name</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">------显示表已有特征</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #0000ff">create</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">table</SPAN><SPAN style="COLOR: #000000">table_name(name</SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #000000">char</SPAN><SPAN style="COLOR: #000000">(</SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">20</SPAN><SPAN style="COLOR: #000000">),age</SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #000000">smallint</SPAN><SPAN style="COLOR: #000000">,lname</SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #000000">varchar</SPAN><SPAN style="COLOR: #000000">(</SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #800000">30</SPAN><SPAN style="COLOR: #000000">))<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #0000ff">insert</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">into</SPAN><SPAN style="COLOR: #000000">table_name</SPAN><SPAN style="COLOR: #0000ff">select</SPAN><SPAN style="COLOR: #000000"><IMG alt="" src="http://www.cnblogs.com/Images/dot.gif"><IMG alt="" src="http://www.cnblogs.com/Images/dot.gif"><IMG alt="" src="http://www.cnblogs.com/Images/dot.gif"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">------实现删除列的方法（创建新表）</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #0000ff">alter</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">table</SPAN><SPAN style="COLOR: #000000">table_name</SPAN><SPAN style="COLOR: #0000ff">drop</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">constraint</SPAN><SPAN style="COLOR: #000000">Stockname_default<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-------删除Stockname的default约束</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>常用函数(</SPAN><SPAN style="COLOR: #0000ff">function</SPAN><SPAN style="COLOR: #000000">)　　<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>转换函数<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #ff00ff">convert</SPAN><SPAN style="COLOR: #000000">(数据类型,值,格式)<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　统计函数<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #ff00ff">AVG</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">求平均值</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">COUNT</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">统计数目</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">MAX</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">求最大值</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">MIN</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">求最小值</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">SUM</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">求和　</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #ff00ff">AVG</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #0000ff">use</SPAN><SPAN style="COLOR: #000000">pangu<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #0000ff">select</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #ff00ff">avg</SPAN><SPAN style="COLOR: #000000">(e_wage)</SPAN><SPAN style="COLOR: #0000ff">as</SPAN><SPAN style="COLOR: #000000">dept_avgWage<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #0000ff">from</SPAN><SPAN style="COLOR: #000000">employee<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #0000ff">group</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #0000ff">by</SPAN><SPAN style="COLOR: #000000">dept_id　　<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #ff00ff">MAX</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">求工资最高的员工姓名</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #0000ff">use</SPAN><SPAN style="COLOR: #000000">pangu<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #0000ff">select</SPAN><SPAN style="COLOR: #000000">e_name<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #0000ff">from</SPAN><SPAN style="COLOR: #000000">employee<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #0000ff">where</SPAN><SPAN style="COLOR: #000000">e_wage</SPAN><SPAN style="COLOR: #808080">=</SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　(</SPAN><SPAN style="COLOR: #0000ff">select</SPAN><SPAN style="COLOR: #000000"></SPAN><SPAN style="COLOR: #ff00ff">max</SPAN><SPAN style="COLOR: #000000">(e_wage)<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #0000ff">from</SPAN><SPAN style="COLOR: #000000">employee)　　<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #ff00ff">STDEV</SPAN><SPAN style="COLOR: #000000">()<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">STDEV()函数返回表达式中所有数据的标准差</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">STDEVP()</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">STDEVP()函数返回总体标准差　　</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #ff00ff">VAR</SPAN><SPAN style="COLOR: #000000">()<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">VAR()函数返回表达式中所有值的统计变异数　　</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #ff00ff">VARP</SPAN><SPAN style="COLOR: #000000">()<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">VARP()函数返回总体变异数　　</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　算术函数　　<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　三角函数<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #ff00ff">SIN</SPAN><SPAN style="COLOR: #000000">(float_expression)</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">返回以弧度表示的角的正弦</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">COS</SPAN><SPAN style="COLOR: #000000">(float_expression)</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">返回以弧度表示的角的余弦</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">TAN</SPAN><SPAN style="COLOR: #000000">(float_expression)</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">返回以弧度表示的角的正切</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">COT</SPAN><SPAN style="COLOR: #000000">(float_expression)</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">返回以弧度表示的角的余切</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　反三角函数<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #ff00ff">ASIN</SPAN><SPAN style="COLOR: #000000">(float_expression)</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">返回正弦是FLOAT值的以弧度表示的角</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">ACOS</SPAN><SPAN style="COLOR: #000000">(float_expression)</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">返回余弦是FLOAT值的以弧度表示的角</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">ATAN</SPAN><SPAN style="COLOR: #000000">(float_expression)</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">返回正切是FLOAT值的以弧度表示的角</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　ATAN2(float_expression1,float_expression2)<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">----返回正切是float_expression1/float_expres-sion2的以弧度表示的角</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">DEGREES</SPAN><SPAN style="COLOR: #000000">(numeric_expression)<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">----把弧度转换为角度返回与表达式相同的数据类型可为</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">----INTEGER/MONEY/REAL/FLOAT类型</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">RADIANS</SPAN><SPAN style="COLOR: #000000">(numeric_expression)<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">----把角度转换为弧度返回与表达式相同的数据类型可为</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">----INTEGER/MONEY/REAL/FLOAT类型</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">EXP</SPAN><SPAN style="COLOR: #000000">(float_expression)</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">返回表达式的指数值</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">LOG</SPAN><SPAN style="COLOR: #000000">(float_expression)</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">返回表达式的自然对数值</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">LOG10</SPAN><SPAN style="COLOR: #000000">(float_expression)</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">返回表达式的以10为底的对数值</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">SQRT</SPAN><SPAN style="COLOR: #000000">(float_expression)</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">返回表达式的平方根</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　取近似值函数<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #ff00ff">CEILING</SPAN><SPAN style="COLOR: #000000">(numeric_expression)<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-----返回>=表达式的最小整数返回的数据类型与表达式相同可为</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-----INTEGER/MONEY/REAL/FLOAT类型</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">FLOOR</SPAN><SPAN style="COLOR: #000000">(numeric_expression)<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-----返回<=表达式的最小整数返回的数据类型与表达式相同可为</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-----INTEGER/MONEY/REAL/FLOAT类型</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">ROUND</SPAN><SPAN style="COLOR: #000000">(numeric_expression)<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-----返回以integer_expression为精度的四舍五入值返回的数据</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-----类型与表达式相同可为INTEGER/MONEY/REAL/FLOAT类型</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">ABS</SPAN><SPAN style="COLOR: #000000">(numeric_expression)<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-----返回表达式的绝对值返回的数据类型与表达式相同可为</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-----INTEGER/MONEY/REAL/FLOAT类型</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">SIGN</SPAN><SPAN style="COLOR: #000000">(numeric_expression)<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-----测试参数的正负号返回0零值1正数或-1负数返回的数据类型</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-----与表达式相同可为INTEGER/MONEY/REAL/FLOAT类型</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">PI</SPAN><SPAN style="COLOR: #000000">()</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-----返回值为π即3.1415926535897936</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">RAND</SPAN><SPAN style="COLOR: #000000">(</SPAN><SPAN style="COLOR: #ff0000">[</SPAN><SPAN style="COLOR: #ff0000">integer_expression</SPAN><SPAN style="COLOR: #ff0000">]</SPAN><SPAN style="COLOR: #000000">)<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">-----用任选的[integer_expression]做种子值得出0-1间的随机浮点数</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>字符串函数<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #ff00ff">ASCII</SPAN><SPAN style="COLOR: #000000">()</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">----函数返回字符表达式最左端字符的ASCII码值</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="FONT-WEIGHT: bold; COLOR: #000000">CHAR</SPAN><SPAN style="COLOR: #000000">()</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">----函数用于将ASCII码转换为字符</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">----如果没有输入0~255之间的ASCII码值CHAR函数会返回一个NULL值</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">LOWER</SPAN><SPAN style="COLOR: #000000">()</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">----函数把字符串全部转换为小写</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">UPPER</SPAN><SPAN style="COLOR: #000000">()</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">----函数把字符串全部转换为大写</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">STR</SPAN><SPAN style="COLOR: #000000">()</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">----函数把数值型数据转换为字符型数据</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">LTRIM</SPAN><SPAN style="COLOR: #000000">()</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">----函数把字符串头部的空格去掉</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">RTRIM</SPAN><SPAN style="COLOR: #000000">()</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">----函数把字符串尾部的空格去掉</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">LEFT</SPAN><SPAN style="COLOR: #000000">(),</SPAN><SPAN style="COLOR: #ff00ff">RIGHT</SPAN><SPAN style="COLOR: #000000">(),</SPAN><SPAN style="COLOR: #ff00ff">SUBSTRING</SPAN><SPAN style="COLOR: #000000">()</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">函数返回部分字符串</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">CHARINDEX</SPAN><SPAN style="COLOR: #000000">(),</SPAN><SPAN style="COLOR: #ff00ff">PATINDEX</SPAN><SPAN style="COLOR: #000000">()</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">函数返回字符串中某个指定的子串出现的开始位置</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">SOUNDEX</SPAN><SPAN style="COLOR: #000000">()</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">----函数返回一个四位字符码</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">----SOUNDEX函数可用来查找声音相似的字符串但SOUNDEX函数对数字和汉字均只返回0值</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">DIFFERENCE</SPAN><SPAN style="COLOR: #000000">()</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">----函数返回由SOUNDEX函数返回的两个字符表达式的值的差异</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">----0两个SOUNDEX函数返回值的第一个字符不同</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">----1两个SOUNDEX函数返回值的第一个字符相同</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">----2两个SOUNDEX函数返回值的第一二个字符相同</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">----3两个SOUNDEX函数返回值的第一二三个字符相同</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">----4两个SOUNDEX函数返回值完全相同同</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">QUOTENAME</SPAN><SPAN style="COLOR: #000000">()</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">----函数返回被特定字符括起来的字符串</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000"><BR><IMG id=Codehighlighter1_7283_7362_Open_Image onclick="this.style.display='none'; Codehighlighter1_7283_7362_Open_Text.style.display='none'; Codehighlighter1_7283_7362_Closed_Image.style.display='inline'; Codehighlighter1_7283_7362_Closed_Text.style.display='inline';" alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif" align=top><IMG id=Codehighlighter1_7283_7362_Closed_Image style="DISPLAY: none" onclick="this.style.display='none'; Codehighlighter1_7283_7362_Closed_Text.style.display='none'; Codehighlighter1_7283_7362_Open_Image.style.display='inline'; Codehighlighter1_7283_7362_Open_Text.style.display='inline';" alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif" align=top>　　</SPAN><SPAN id=Codehighlighter1_7283_7362_Closed_Text style="BORDER-RIGHT: #808080 1px solid; BORDER-TOP: #808080 1px solid; DISPLAY: none; BORDER-LEFT: #808080 1px solid; BORDER-BOTTOM: #808080 1px solid; BACKGROUND-COLOR: #ffffff">/**/</SPAN><SPAN id=Codehighlighter1_7283_7362_Open_Text><SPAN style="COLOR: #008080">/*</SPAN><SPAN style="COLOR: #008080">selectquotename('abc','{')quotename('abc')<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif" align=top>　　运行结果如下<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif" align=top>　　{<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif" align=top>　　{abc}[abc]</SPAN><SPAN style="COLOR: #008080">*/</SPAN></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #ff00ff">REPLICATE</SPAN><SPAN style="COLOR: #000000">()</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">----函数返回一个重复character_expression指定次数的字符串</SPAN><SPAN style="COLOR: #008080"><BR><IMG id=Codehighlighter1_7426_7507_Open_Image onclick="this.style.display='none'; Codehighlighter1_7426_7507_Open_Text.style.display='none'; Codehighlighter1_7426_7507_Closed_Image.style.display='inline'; Codehighlighter1_7426_7507_Closed_Text.style.display='inline';" alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif" align=top><IMG id=Codehighlighter1_7426_7507_Closed_Image style="DISPLAY: none" onclick="this.style.display='none'; Codehighlighter1_7426_7507_Closed_Text.style.display='none'; Codehighlighter1_7426_7507_Open_Image.style.display='inline'; Codehighlighter1_7426_7507_Open_Text.style.display='inline';" alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN id=Codehighlighter1_7426_7507_Closed_Text style="BORDER-RIGHT: #808080 1px solid; BORDER-TOP: #808080 1px solid; DISPLAY: none; BORDER-LEFT: #808080 1px solid; BORDER-BOTTOM: #808080 1px solid; BACKGROUND-COLOR: #ffffff">/**/</SPAN><SPAN id=Codehighlighter1_7426_7507_Open_Text><SPAN style="COLOR: #008080">/*</SPAN><SPAN style="COLOR: #008080">selectreplicate('abc',3)replicate('abc',-2)<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif" align=top>　　运行结果如下<BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif" align=top><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif" align=top>　　abcabcabcNULL</SPAN><SPAN style="COLOR: #008080">*/</SPAN></SPAN><SPAN style="COLOR: #000000"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top>　　</SPAN><SPAN style="COLOR: #ff00ff">REVERSE</SPAN><SPAN style="COLOR: #000000">()</SPAN><SPAN style="COLOR: #008080">--</SPAN><SPAN style="COLOR: #008080">----函数将指定的字符串的字符排列顺序颠倒</SPAN><SPAN style="COLOR: #008080"><BR><IMG alt="" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" align=top></SPAN><SPAN style="COLOR: #000000">　　</SPAN><SPAN style="COLOR: #ff00ff">REPLACE</SPAN><SPAN style="COLOR: #000000">()</SPAN><SPAN style=&quo