sql case where子句

Question

我在SSRS中有一份報告，其中一個參數是基於某人是否參加面試，未參加或當前沒有反饋。

SQL如下：

SELECT 
   (C.Forename + ' ' + C.Surname) as Fullname, 
   C.NINO, 
   S.SignpostingType, ST.StakeholderDesc, S.SignpostDate, 
   (CASE WHEN S.Attended = 0 THEN 'False' ELSE 'True' END) AS Attended, 
   (CASE WHEN S.FailedToAttend = 0 THEN 'False' ELSE 'True' END) AS FailedToAttend, 
   (CASE WHEN S.Experience = '.' THEN '' ELSE S.Experience END) AS Experience  
FROM 
    Customer C 
INNER JOIN
    Signposting S on S.CustomerID = C.CustomerID 
INNER JOIN 
    Stakeholder ST on ST.StakeholderID = S.StakeholderID 
WHERE 
    (S.SignpostDate >= '2001-01-01' And S.SignpostDate <= '2015-01-01') 
    AND (S.StakeholderID in (1,2,3,4,5,6,7,52,53,55,70,71,73)) 
    --AND (S.Experience in (@Experience))
    --AND (S.SignpostingType in (@SignpostType))
    AND
       CASE @Attended   
           WHEN 0 THEN (S.Attended = 1 AND S.FailedToAttend = 0)
           WHEN 1 THEN (S.Attended = 0 AND S.FailedToAttend = 1)
           WHEN 2 THEN (S.Attended = 0 AND S.FailedToAttend = 0)
       END

問題在於最終的AND條件。 根據@Attended的值，我希望在查詢中使用不同的列值。

我知道我可以在存儲過程中動態地做到這一點，但是有人要求我寫一些可以在SSRS中包含所有SQL的東西。 我只是想確保在我繼續選擇之前，先要用盡我的所有選擇。

在此先感謝您的時間和幫助。

Answer 1

可以使用AND和OR語句的組合來完成-此處無需CASE 。

AND (
 (@Attended = 0 AND S.Attended = 1 AND S.FailedToAttend = 0) OR
 (@Attended = 1 AND S.Attended = 0 AND S.FailedToAttend = 1) OR
 (@Attended = 2 AND S.Attended = 0 AND S.FailedToAttend = 0) )

Answer 2

SELECT 
   (C.Forename + ' ' + C.Surname) as Fullname, 
   C.NINO, 
   S.SignpostingType, ST.StakeholderDesc, S.SignpostDate, 
   A.Attended, 
   A.FailedToAttend, 
   (CASE WHEN S.Experience = '.' THEN '' ELSE S.Experience END) AS Experience  
FROM 
    Customer C 
INNER JOIN
    Signposting S on S.CustomerID = C.CustomerID 
INNER JOIN 
    Stakeholder ST on ST.StakeholderID = S.StakeholderID
INNER JOIN
    (VALUES
       (0,'True' ,'False'),
       (1,'False','True' ),
       (2,'False','False')
    ) A(Code,Attended,FailedToAttend) on A.Code = @Attended
WHERE 
    (S.SignpostDate >= '2001-01-01' And S.SignpostDate <= '2015-01-01') 
    AND (S.StakeholderID in (1,2,3,4,5,6,7,52,53,55,70,71,73))