SQL多条件查询几种实现方法详细介绍

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

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 
 

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