Question

我想根据条件过滤表格。像 -

   CREATE TABLE [dbo].[tblUserInfo](
   [Id] [int] NOT NULL,
   [TypeName] [int] NOT NULL,
   [Value] [decimal](18, 2) NULL,
   [Name] [nvarchar](250) NULL,
   ) 

 DECLARE @SearchText VARCHAR(250)='aa'

 SELECT *FROM tblUserInfo

@SearchText有文本然后按TypeName列过滤， @SearchText为null，然后按名称列过滤。

仅举例。

我怎么能实现这一目标？提前谢谢。

Answer 1

您的where子句应如下所示：

where (@SearchText is null and Name = '.....') --filter by Name
   or (@SearchText is not null and TypeName = '.....') --filter by TypeName

Answer 2

DECLARE @SearchText VARCHAR(250)='aa'

SELECT *FROM tblUserInfo 
WHERE CASE WHEN @SearchText IS NULL THEN Name ELSE 'a' END = CASE WHEN @SearchText IS NULL THEN 'hehe' ELSE 'a' END
AND 
(
    CASE WHEN @SearchText IS NOT NULL THEN TypeName ELSE 1 END = CASE WHEN @SearchText IS NOT NULL THEN 2 ELSE 1 END
    OR 
    CASE WHEN @SearchText IS NOT NULL THEN TypeName ELSE 1 END = CASE WHEN @SearchText IS NOT NULL THEN 3 ELSE 1 END
 )

我试过这样，有没有更好的解决方案？

基于条件的不同列的SQL过滤器

2 个答案: