Question

我正在使用参数创建一个过程，并且基于参数我必须在where子句示例中放置不同的过滤器：

@para1 
as  

    Select a,b,c from z 
        where @para1 = 0 then a = a 
          and @para1 = 1  then a between 1 to 10 
          and @para1 = 2 then a  between 11 and 20

Answer 1

使用LocationRequest.PRIORITY_HIGH_ACCURACY逻辑

AND/OR

Answer 2

你可以围绕这些线做点什么。以下AND OR的组合与CASE

类似

Select a,b,c 
from z 
where (@para1 = 0 AND A = A ) -- A=A condition is pointless though
    OR (@para1 = 1  AND a between 1 and 10 )
    OR (@para1 = 2  AND a between 11 and 20)

Answer 3

试试这个mehtod：

DECLARE @Cond AS NVARCHAR(1000)
if @para1 = 0 
  SET @Cond = ' a = a'
else if @para1 = 1
  SET @Cond = ' a between 1 and 10'
else if @para1 = 2
  SET @Cond = ' a between 11 and 20'

EXEC('Select a,b,c from z where ' + @Cond )

Answer 4

你可以试试这个

 if(@para1=0)
Begin 
----
End
 if(@para1=1)
Begin 
----
End

如果你有多个条件，那么

select * from <tableName> where 1=1 AND (@para1=1 || ----)
AND (@para1=2 || ----)

Answer 5

您好，您可以从参数测试开始，然后像这样的操作符。

@para1 as
Select a,b,c
from z
where (@para1 = 0) or (@para1 = 1 and a >= 1 and a <= 10) or (@para1 = 2 and a >= 11 and a <= 20);

注意a = a将始终返回true，除非a设置为null。

祝你好运。

不同情况下在where子句中获取记录

5 个答案: