SQL Sum関数when-Caseステートメント

Question

私は間違ったソリューション[TOTALTesellum]を実行したときにcaseステートメントでSUM関数を使用します。私はここで何を行うことができ、私のSQLコードは、私はあなたのクエリから理解何

SELECT CUS.NAME AS [Tedarikçi], GOOD.NAME AS [Ürün] , 
    SUM(CASE WHEN PDET.ORDERDATE <= GETDATE() THEN PDET.COUNT ELSE 0 END) AS[Haftalık Sipariş], 
    SUM(CASE WHEN PDET.COUNT IS NOT NULL THEN PDET.COUNT ELSE 0 END) AS [Toplam Sipariş], 
    SUM(CASE WHEN TES.TESELLUMDATE IS NOT NULL THEN TES.ORDERAMOUNT ELSE 0 END) AS[TOTALTesellum], 
-- SUM(TES.ORDERAMOUNT) AS [Toplam Tesellum], 


(CASE WHEN SUM(CASE WHEN PDET.ORDERDATE <= GETDATE() THEN PDET.COUNT ELSE 0 END) > SUM(PDET.COUNT) THEN SUM(CASE WHEN PDET.ORDERDATE <= GETDATE() THEN PDET.COUNT ELSE 0 END) - SUM(PDET.COUNT) ELSE 0 END) AS [Fazlalık] , 

(CASE WHEN SUM(PDET.COUNT) > SUM(CASE WHEN PDET.ORDERDATE <= GETDATE() THEN PDET.COUNT ELSE 0 END) THEN SUM(PDET.COUNT) - SUM(CASE WHEN PDET.ORDERDATE <= GETDATE() THEN PDET.COUNT ELSE 0 END) ELSE 0 END) AS [Eksiklik] 

--ORDER BY TES.TESELLUMDATE DESC AS [asxasxa] 

FROM  dbo.IDTESELLUMDATA TES INNER JOIN 
        dbo.IDLANDPRELOADS PRE ON TES.SUPPLIERID = PRE.EXPORTERCUSTOMERID 
        INNER JOIN 
        dbo.IDLANDPRELOADDETAILS PDET ON PDET.PRELOADID = PRE.ID 

        INNER JOIN 
        dbo.IDCUSTOMERS CUS ON TES.SUPPLIERID = CUS.ID AND 
        PRE.EXPORTERCUSTOMERID = CUS.ID 
        INNER JOIN 
        dbo.IDLANDGOODSDEFINITIONS GOOD ON TES.GOODID = GOOD.ID AND PDET.GOODSID = GOOD.ID 

        GROUP BY CUS.NAME , GOOD.NAME 

Answer 1

ある - ちょうど再フォーマットや再アレンジスクリプト、これは

SELECT M.[Ürün], 
     M.[Haftalık Sipariş], 
     M.[Toplam Sipariş], 
     M.[TOTALTesellum], 
     CASE WHEN M.[Haftalık Sipariş] > M.[PDET COUNT] THEN M.[Haftalık Sipariş] - M.[PDET COUNT] ELSE 0 END AS [Fazlalık], 
     CASE WHEN M.[PDET COUNT] > M.[Haftalık Sipariş] THEN M.[PDET COUNT]-M.[Haftalık Sipariş] ELSE 0 END AS [Eksiklik] 
FROM(
    SELECT CUS.NAME AS [Tedarikçi], GOOD.NAME AS [Ürün] , 
      SUM(CASE WHEN PDET.ORDERDATE <= GETDATE() THEN PDET.COUNT ELSE 0 END) AS[Haftalık Sipariş], 
      SUM(CASE WHEN PDET.COUNT IS NOT NULL THEN PDET.COUNT ELSE 0 END) AS [Toplam Sipariş], 
      SUM(DISTINCT CASE WHEN TES.TESELLUMDATE IS NOT NULL THEN TES.ORDERAMOUNT ELSE 0 END) AS[TOTALTesellum], 
      SUM(PDET.COUNT) AS [PDET COUNT] 
    FROM dbo.IDTESELLUMDATA TES 
    INNER JOIN dbo.IDLANDPRELOADS PRE ON TES.SUPPLIERID = PRE.EXPORTERCUSTOMERID 
    INNER JOIN dbo.IDLANDPRELOADDETAILS PDET ON PDET.PRELOADID = PRE.ID 
    INNER JOIN dbo.IDCUSTOMERS CUS ON TES.SUPPLIERID = CUS.ID AND PRE.EXPORTERCUSTOMERID = CUS.ID 
    INNER JOIN dbo.IDLANDGOODSDEFINITIONS GOOD ON TES.GOODID = GOOD.ID AND PDET.GOODSID = GOOD.ID 
    GROUP BY CUS.NAME, GOOD.NAME 
)M