PIVOT和SQL Server的幾個聚集2014

Question

我現在的理解是，它是不可能有幾個聚集 - 比如下面的例子附加SUM（Measure2）：

IF OBJECT_ID('tempdb..#Dim1') IS NOT NULL DROP TABLE #Dim1 
IF OBJECT_ID('tempdb..#Dim2') IS NOT NULL DROP TABLE #Dim2 
IF OBJECT_ID('tempdb..#Facts') IS NOT NULL DROP TABLE #Facts 

CREATE TABLE #Dim1 
(
    Id INT IDENTITY(1,1), 
    DimName NVARCHAR(100) 
) 

CREATE TABLE #Dim2 
(
    Id INT IDENTITY(1,1), 
    DimName NVARCHAR(100) 
) 

CREATE TABLE #Facts 
(
    Id INT IDENTITY(1,1), 
    Dim1Id INT, 
    Dim2Id INT, 
    Measure1 FLOAT, 
    Measure2 FLOAT 
) 

INSERT INTO #Dim1 
    SELECT N'Dim1Name1' 
     UNION ALL 
    SELECT N'Dim1Name2' 
     UNION ALL 
    SELECT N'Dim1Name3' 

INSERT INTO #Dim2 
    SELECT N'Dim2Name1' 
     UNION ALL 
    SELECT N'Dim2Name2' 

INSERT INTO #Facts 
    SELECT 1, 2, 2, 10 
     UNION ALL 
    SELECT 1, 2, 10, 3 
     UNION ALL 
    SELECT 1, 1, 1, 56 
     UNION ALL 
    SELECT 2, 1, 5, 4 
     UNION ALL 
    SELECT 2, 2, 4, 4 
     UNION ALL 
    SELECT 3, 1, 4, 1 
     UNION ALL 
    SELECT 3, 1, 20, 56 

;WITH CTE1 AS 
(
    SELECT 
     Facts.Measure1, 
     Dimensions1.DimName AS DimName1, 
     Dimensions2.DimName AS DimName2 
    FROM #Facts AS Facts 
    INNER JOIN #Dim1 AS Dimensions1 ON Facts.Dim1Id = Dimensions1.Id 
    INNER JOIN #Dim2 AS Dimensions2 ON Facts.Dim2Id = Dimensions2.Id 
) 
SELECT 
    * 
FROM CTE1 
PIVOT 
(
    SUM(Measure1) 
    FOR DimName2 
    IN([Dim2Name1], [Dim2Name2]) 
) AS X; 

這是真正的情況和我是否必須對這些情景使用舊的'MAX CASE'方法？

Answer 1

對您有幫助嗎？

;WITH CTE1 AS 
(
    SELECT 
     Facts.Measure1, 
     Facts.Measure2, 
     Dimensions1.DimName AS DimName1, 
     Dimensions2.DimName AS DimName2 
    FROM #Facts AS Facts 
    INNER JOIN #Dim1 AS Dimensions1 ON Facts.Dim1Id = Dimensions1.Id 
    INNER JOIN #Dim2 AS Dimensions2 ON Facts.Dim2Id = Dimensions2.Id 
) 
SELECT 
    DimName1, 
    CAST(SUBSTRING(X.[Dim2Name1], 1, 10) AS INT) Dim2Name1Measure1, 
    CAST(SUBSTRING(X.[Dim2Name1], 11, 10) AS INT) Dim2Name1Measure2, 
    CAST(SUBSTRING(X.[Dim2Name2], 1, 10) AS INT) Dim2Name2Measure1, 
    CAST(SUBSTRING(X.[Dim2Name2], 11, 10) AS INT) Dim2Name2Measure2 
FROM 
(
    SELECT 
     CAST(SUM(Measure1) AS CHAR(10)) + CAST(SUM(Measure2) AS CHAR(10)) AS Combined, 
     DimName1, 
     DimName2 
    FROM CTE1 
    GROUP BY 
     DimName1, 
     DimName2 
) S 
PIVOT 
(
    MAX(Combined) 
    FOR DimName2 
    IN([Dim2Name1], [Dim2Name2]) 
) AS X;