T-SQL IF-ELSE

Question

是否有可能使用IF-ELSE或类似的东西做这样的事情:

SELECT
MemberID,
ProfileTypeID
PrCountryID,    -- 3
PrStateID,      -- 4
PrStateInt
FROM Member
WHERE PrCity IS NOT NULL
IF @ShowUnclaimed = 'N'
    AND Claimed = 'Y'
    AND SBIcon = 'N'
END
AND Viewable = 'Y'
AND SystemID = 2

非常感谢任何信息.

neojakey

Answer 1

没有必要使用Case这个

SELECT
    MemberID,
    ProfileTypeID
    PrCountryID,    -- 3
    PrStateID,      -- 4
    PrStateInt
FROM Member
WHERE PrCity IS NOT NULL
AND Viewable = 'Y'
AND SystemID = 2
AND ( @ShowUnclaimed != 'N' 
      OR ( Clamed = 'Y' AND SBIcon = 'N' )
    )