如何where子句中的過程

Question

查詢＃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) 

查詢＃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) 

查詢＃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) 

結果使用相同的SQL查詢多個：

Select @in_empcount, @in_empcount1, @in_empcount2 

這是我正在處理的示例查詢。我可以做一些類似的事情嗎？不需要爲每個條款for (b.in_rolecode)重複相同的選擇語句，結果會是相同的嗎？

Answer 1

這是你的要求 - 包括你的IN條款所有這些值：

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

IN子句工作就像or子句，因此沒有必要對這些查詢分開。

編輯 - 根據您最新的修改，你打算用例和COUNT（你也可以使用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