WHERE語句基於CASE語句

Question

我試圖根據變量的值添加CASE語句：

WHERE DTH.PointPerson LIKE @userParam
    AND ActivityDate >= @startDateParam
    AND ActivityDate <= @endDateParam

    --new section below
    AND CASE (@orgTeamPK)
    WHEN '%' THEN
     (USR.[OrganizationalTeamId] LIKE @orgTeamPK OR USR.[OrganizationalTeamId] IS NULL)
     ELSE
     (USR.[OrganizationalTeamId] LIKE @orgTeamPK)

但是我的語法似乎已關閉。 我如何實現上述嘗試？

Answer 1

你不需要case stmt。

    WHERE DTH.PointPerson LIKE @userParam
        AND ActivityDate >= @startDateParam
        AND ActivityDate <= @endDateParam
        AND (
            (@orgTeamPK = '%' AND (USR.[OrganizationalTeamId] LIKE @orgTeamPK OR USR.[OrganizationalTeamId] IS NULL) )
            OR
            (@orgTeamPK <> '%' AND (USR.[OrganizationalTeamId] LIKE @orgTeamPK ) )

Answer 2

正如@Anup所提到的，你不需要 case語句，但imho使用case使語法更清晰...... where子句中的每個部分必須是“PREDICATE”，即它必須求值為布爾值。 where子句中的case語句不會計算為布爾值。 要修復，請按以下方式更改：

 WHERE DTH.PointPerson LIKE @userParam
   AND ActivityDate >= @startDateParam
   AND ActivityDate <= @endDateParam

   --new section below
   AND USR.OrganizationalTeamId Like 
        CASE (@orgTeamPK) WHEN '%' THEN coalesce(@orgTeamPK, USR.OrganizationalTeamId)
              ELSE @orgTeamPK end