Question

查询＃1

SELECT 
    @IN_EMPCOUNT = COUNT (a.CH_EMPCODE) 
FROM 
    BSC_REVIEW_EMP_MASTER a
INNER JOIN 
    dbo.cmn_authorization b ON (CASE b.vc_bu WHEN '%' THEN a.BUSSCD ELSE b.vc_bu END) =  a.BUSSCD           
WHERE 
    IN_REVIEW_NO = @in_review_no
    AND b.ch_empcode = @ch_empcode  
    AND b.in_rolecode IN (136, 137, 138)

查询＃2

SELECT 
    @IN_EMPCOUNT1 = COUNT (a.CH_EMPCODE) 
FROM 
    BSC_REVIEW_EMP_MASTER a
INNER JOIN 
    dbo.cmn_authorization b ON (CASE b.vc_bu WHEN '%' THEN a.BUSSCD ELSE b.vc_bu END) =  a.BUSSCD           
WHERE 
    IN_REVIEW_NO = @in_review_no
    AND b.ch_empcode = @ch_empcode  
    AND b.in_rolecode IN (138, 139, 140)

查询＃3

SELECT 
    @IN_EMPCOUNT2 = COUNT (a.CH_EMPCODE) 
FROM 
    BSC_REVIEW_EMP_MASTER a
INNER JOIN 
    dbo.cmn_authorization b ON (CASE b.vc_bu WHEN '%' THEN a.BUSSCD ELSE b.vc_bu END) =  a.BUSSCD           
WHERE 
    IN_REVIEW_NO = @in_review_no
    AND b.ch_empcode = @ch_empcode  
    AND b.in_rolecode IN (141, 142, 145)

结果：

Select @in_empcount, @in_empcount1, @in_empcount2

这是我正在处理的示例查询。我可以做一些事情，比如不必为每个where子句for (b.in_rolecode)重复相同的select语句，结果会相同吗？

Answer 1

这就是您所要求的 - 包括IN条款中的所有值：

select name 
from tabl1 
where id in ( 1,2,3,4,8,9 )

IN子句就像OR子句一样工作，因此不需要将这些查询分开。

编辑 - 根据您的最新编辑，您希望使用CASE和COUNT（您也可以使用SUM，但它的工作方式相同）：

SELECT 
    COUNT (CASE WHEN b.in_rolecode IN (136,137,138) THEN 1 END) in_empcount,
    COUNT (CASE WHEN b.in_rolecode IN (138,139,140) THEN 1 END) in_empcount1,
    COUNT (CASE WHEN b.in_rolecode IN (141,142,145) THEN 1 END) in_empcount2
FROM BSC_REVIEW_EMP_MASTER a
    INNER JOIN dbo.cmn_authorization b
         ON (CASE b.vc_bu WHEN '%' THEN a.BUSSCD ELSE b.vc_bu END) =  a.BUSSCD           
WHERE IN_REVIEW_NO = @in_review_no
    AND b.ch_empcode =@ch_empcode

如何在过程中对多个where子句使用相同的sql查询

1 个答案: