[英]Row and column average in dynamic pivot
在SQL Server 2008中,我有一個包含3列的表tblStock
:
PartCode (NVARCHAR (50))
StockQty (INT)
Location (NVARCHAR(50))
以下是一些示例數據:
我想得到以下輸出,
我已經編寫了以下查詢以獲取上述輸出, Avg
價值未正確返回:
IF OBJECT_ID('tempdb..#tblStock') IS NOT NULL /*Then it exists*/
DROP TABLE #tblStock
SELECT *
INTO #tblStock
FROM
(SELECT 'A' PartCode, 10 StockQty, 'WHs-A' Location
UNION ALL
SELECT 'B', 22, 'WHs-A'
UNION ALL
SELECT 'A', 1, 'WHs-B'
UNION ALL
SELECT 'C', 20, 'WHs-A'
UNION ALL
SELECT 'D', 39, 'WHs-F'
UNION ALL
SELECT 'E', 3, 'WHs-D'
UNION ALL
SELECT 'F', 7, 'WHs-A'
UNION ALL
SELECT 'A', 9, 'WHs-C'
UNION ALL
SELECT 'D', 2, 'WHs-A'
UNION ALL
SELECT 'F', 54, 'WHs-E') TAB
SELECT * FROM #tblStock
DECLARE @cols NVARCHAR (MAX)
SELECT @cols = COALESCE (@cols + ',[' + Location + ']', '[' + Location + ']')
FROM (SELECT DISTINCT Location FROM #tblStock) PV
ORDER BY Location
-- Since we need Total in last column, we append it at last
SELECT @cols += ',[AVG]'
-- Variable to replace NULL with zero
DECLARE @NulltoZeroCols NVARCHAR (MAX)
SELECT @NullToZeroCols = SUBSTRING((SELECT ',ISNULL(['+Location+'],0) AS ['+Location+']'
FROM (SELECT DISTINCT Location FROM #tblStock)TAB
ORDER BY Location FOR XML PATH('')),2,8000)
SELECT @NullToZeroCols += ',ISNULL([AVG],0) AS [AVG]'
DECLARE @query NVARCHAR(MAX)
SET @query = 'SELECT PartCode,' + @NulltoZeroCols + ' FROM
(
SELECT
ISNULL(CAST(PartCode AS VARCHAR(30)),''AVG'')PartCode,
AVG(StockQty) StockQty ,
ISNULL(Location,''AVG'')Location
FROM #tblStock
GROUP BY Location,PartCode
WITH CUBE
) x
PIVOT
(
AVG(StockQty)
FOR Location IN (' + @cols + ')
) p
ORDER BY CASE WHEN (PartCode=''AVG'') THEN 1 ELSE 0 END,PartCode'
EXEC SP_EXECUTESQL @query
誰能知道這個問題的解決方案?
通過更改您的SET查詢,我獲得了所需的結果。
我認為您需要添加RIGHT JOIN來列出每個PartCode和位置(否則AVG函數無法正確計算項目數)。 我也將ISNULL添加到AVG(StockQty)。 此外,您應該將平均值轉換為數字。
SET @query = 'SELECT PartCode,' + @NulltoZeroCols + ' FROM
(SELECT
ISNULL(CAST(X.PC AS VARCHAR(30)),''AVG'') PartCode,
AVG(CAST(ISNULL(StockQty,0) AS NUMERIC(10,2))) StockQty,
ISNULL(Y.LC,''AVG'') Location
FROM #tblStock
RIGHT JOIN (SELECT DISTINCT PartCode AS PC FROM #tblStock) X
CROSS JOIN (SELECT DISTINCT Location AS LC FROM #tblStock) Y
ON Y.LC = #tblStock.LOCATION AND X.PC=#tblStock.PARTCODE
GROUP BY Y.LC, X.PC
WITH CUBE
) x
PIVOT
(
AVG(StockQty)
FOR Location IN (' + @cols + ')
) p
ORDER BY CASE WHEN (PartCode=''AVG'') THEN 1 ELSE 0 END,PartCode'
輸出:
PartCode WHs-A WHs-B WHs-C WHs-D WHs-E WHs-F AVG
------------------------------ --------------------------------------- --------------------------------------- --------------------------------------- --------------------------------------- --------------------------------------- --------------------------------------- ---------------------------------------
A 10.000000 1.000000 9.000000 0.000000 0.000000 0.000000 3.333333
B 22.000000 0.000000 0.000000 0.000000 0.000000 0.000000 3.666666
C 20.000000 0.000000 0.000000 0.000000 0.000000 0.000000 3.333333
D 2.000000 0.000000 0.000000 0.000000 0.000000 39.000000 6.833333
E 0.000000 0.000000 0.000000 3.000000 0.000000 0.000000 0.500000
F 7.000000 0.000000 0.000000 0.000000 54.000000 0.000000 10.166666
AVG 10.166666 0.166666 1.500000 0.500000 9.000000 6.500000 4.638888
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