SQL 多条件查询
以后我们做多条件查询,一种是排列结合,另一种是动态拼接SQL
如:我们要有两个条件,一个日期@addDate,一个是@name
第一种写法是
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if (@addDate is not null ) and (@ name <> '' ) select * from table where addDate = @addDate and name = @ name else if (@addDate is not null ) and (@ name = '' ) select * from table where addDate = @addDate else if(@addDate is null ) and (@ name <> '' ) select * from table where and name = @ name else if(@addDate is null ) and (@ name = '' ) select * from table |
第二种就是动态组成SQL,通过exec来执行,我就不写,
昨天我想到一种办法
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select * from table where (addDate = @addDate or @addDate is null ) and ( name = @ name or @ name = '' ) |
结果一调试,成功,
一点想法,有更好方法的,请指教!~
感谢阅读,希望能帮助到大家,谢谢大家对本站的支持!
原文链接:http://www.cnblogs.com/edobnet/archive/2004/07/16/24781.html