Question

我在SQL中有以下SP：

ALTER PROCEDURE [dbo].[search_employee_special]  
 (  
 @employeruid uniqueidentifier,
 @groupuid uniqueidentifier,
 @includedependants bit = 0
 )  
AS

DECLARE @emptyuid uniqueidentifier
SET @emptyuid = CAST(CAST(0 AS BINARY) AS UNIQUEIDENTIFIER)

SELECT 
    emp.id,
    emp.name
FROM employee emp
WHERE emp.isactive = 1
  AND employeruid = @employeruid 
  AND (@groupuid = @emptyuid  OR emp.gropuid = @groupuid)

使用过滤器

效果很好，当@groupuid为空GUID时，它不会按groupuid过滤，否则按groupuid过滤...

现在，我需要的是一点点复杂，因为我必须结合其他参数：

 ALTER PROCEDURE [dbo].[search_employee_special]  
     (  
     @employeruid uniqueidentifier,
     @groupuid uniqueidentifier,
     @includedependants bit = 0
     )  
    AS

        DECLARE @emptyuid uniqueidentifier
        SET @emptyuid = CAST(CAST(0 AS BINARY) AS UNIQUEIDENTIFIER)

        SELECT 
            emp.id,
            emp.name
        FROM employee emp
        WHERE emp.isactive = 1
          AND employeruid = @employeruid 
        --AND (@groupuid = @emptyuid  OR emp.gropuid = @groupuid)
          AND (
               (@includedependants = 0 AND 
                  (@groupuid  = @emptyuid 
                  OR emp.groupuid = @groupuid))    
              OR emp.specialgroupuid = @groupuid)

这不起作用 ...我需要的是，如果@includedependants = 1则会过滤emp.specialgroupuid，否则会过滤emp.groupuid。

有关如何解决的任何线索？我确信这很简单：）

提前感谢帮助。

Answer 1

AND (
     (
      @includedependants = 0 AND 
      (@groupuid  = @emptyuid OR emp.groupuid = @groupuid)
     )    
     OR emp.specialgroupuid = @groupuid
    )

OR部分将始终运行，无论@includedependants的值是什么，我猜这不是你想要的。你想要的更像是什么;

AND (
     (
      @includedependants = 0 AND 
      (@groupuid  = @emptyuid OR emp.groupuid = @groupuid)
     )    
     OR 
     (
      @includedependants = 1 AND 
      emp.specialgroupuid = @groupuid
     )
    )

Answer 2

我会用一个案子。不幸的是，所需的语法使它非常难看。

AND 1 = case when @includedependants = 1 then 
        case when emp.specialgroupuid = @groupuid then 1 else 0 end
    else 
        case when @groupuid  = @emptyuid OR emp.groupuid = @groupuid then 1 else 0 end 
    end

SQL Query条件在哪里使用过滤器

2 个答案: