我有一个显示查询，基本上显示库存，订单和保留库存。除了一个部分之外一切都很好 - 重量和数量的总和会返回一倍的结果（仅在订购量有限的情况下）。我确定我已经塞满了我的联合，但我无法弄清楚如何。
当前输出（加倍）：
PartNo Branch SOHWeight SOHQty ReservedQty SOOEa SOOTo AvgCost type product grade coating finish thickness width length dim1 dim2 Notes ClassFBR ClassFME ClassFSY AltoQty
-------------------------- ------ --------- ------ ----------- ----- ----- ------- ---- ------- ----- ------- ------ --------- ----- ------ ---- ---- -----
B-254-304---5--40-40-6000 FME 0.33 18 NULL NULL 1.5 68.7494 B ANGLE-E 304 NULL 5 NULL 6000 40 40 NULL C A B NULL
Warning: Null value is eliminated by an aggregate or other SET operation.
预期输出完全相同，但SOHWeight和SOHQty应减半（与当前输出相比）
注意：
SELECT dbo.tblProducts.PartNo,
'FME' AS Branch,
SUM(sOh.Weight) AS SOHWeight,
SUM(sOh.Quantity) AS SOHQty,
SUM(dbo.tblReserveDetail.Quantity) AS ReservedQty,
SUM(iif(dbo.tblPurchaseOrderDetail.QuantityUnit = 'TO', NULL, dbo.tblPurchaseOrderDetail.QuantityAmount)) AS SOOEa,
SUM(iif(dbo.tblPurchaseOrderDetail.QuantityUnit = 'TO', dbo.tblPurchaseOrderDetail.QuantityAmount, NULL)) AS SOOTo,
SUM(IIF(SoH.TYPE IN ( 'C', 'SC' ), SoH.COST * SoH.WEIGHT, SoH.COST * SoH.QUANTITY) + PROCESSINGCOST + PROCESSINGFREIGHT + Packaging) / SUM(IIF(SoH.TYPE IN ( 'C', 'SC' ), sOh.weight, sOh.Quantity)) AS AvgCost,
tblProducts.type,
tblProducts.product,
tblProducts.grade,
tblProducts.coating,
tblProducts.finish,
tblProducts.thickness,
tblProducts.width,
tblProducts.length,
tblProducts.dim1,
tblProducts.dim2,
tblProducts.Notes,
tblProducts.ClassFBR,
tblProducts.ClassFME,
tblProducts.ClassFSY,
SUM(IIF(SoH.STATUS = 'SC', SoH.QUANTITY, NULL)) AS AltoQty
FROM DBO.tblProducts
LEFT OUTER JOIN dbo.tblStockOnHand SoH
ON tblProducts.PartNo = SOH.ProductDesc
AND SoH.Status IN ( 'I', 'R', 'SC' )
AND SoH.branch = 'FME'
LEFT OUTER JOIN dbo.tblReserveDetail
RIGHT OUTER JOIN dbo.tblReserveHeader
ON dbo.tblReserveHeader.ID = dbo.tblReserveDetail.ReserveID
AND tblReserveHeader.Completed = 0
AND tblReserveHeader.Cancelled = 0
ON SOH.PACKNOID = tblReserveDetail.PacknoID
LEFT OUTER JOIN tblPurchaseOrderDetail
ON dbo.tblPurchaseOrderDetail.ProductDesc = dbo.tblProducts.PartNo
AND ( dbo.tblPurchaseOrderDetail.Status = N'O'
OR dbo.tblPurchaseOrderDetail.Status = N'PD' )
AND tblPurchaseOrderDetail.branch = 'FME'
GROUP BY dbo.tblProducts.PartNo,
tblProducts.type,
tblProducts.product,
tblProducts.grade,
tblProducts.coating,
tblProducts.finish,
tblProducts.thickness,
tblProducts.width,
tblProducts.length,
tblProducts.dim1,
tblProducts.dim2,
tblProducts.Notes,
tblProducts.ClassFBR,
tblProducts.ClassFME,
tblProducts.ClassFSY
样本数据（剥离）： tblStockOnHand：
PackNoID Status Weight Quantity Cost ProcessingCost ProcessingFreight Packaging Branch tblstockonhand.ProductDesc
157220 I 0.165 9 $68.47 $0.00 $2.48 $0.00 FME B-254-304---5--40-40-6000
158620 I 0.01839825 1 $64.27 $0.00 $4.72 $0.00 FSY B-254-304---5--40-40-6000
tblPurchaseOrderDetail
RecordId Status OrderNumber ItemNumber QuantityAmount QuantityUnit PriceQuantity PriceUnit Branch ProductDesc
6976 FD 4441 18 0.25 TO 3790 TO FBR B-254-304---5--40-40-6000
6936 O 4439 23 0.5 TO 3790 TO FME B-254-304---5--40-40-6000
6912 FD 4437 1 20 EA 75.96 EA FSY B-254-304---5--40-40-6000
tblPurchaseOrderHeader
Status OrderNumber Branch
O 4439 FME
tblProducts
PartNo ClassFBR ClassFME ClassFSY Notes Type Product Grade Finish Coating Thickness Width Length Dim1 Dim2
B-254-304---5--40-40-6000 C A B B ANGLE-E 304 5 6000 40 40
答案 0 :(得分：0)
没有查看详细信息，右外部加入是可疑的。右外连接总是可以用左外连接替换，并且将两者一起使用可能会产生令人困惑的查询。这可能是造成双重结果的原因。尝试重构，以便所有连接都留在外部而不是组合。
答案 1 :(得分：0)
最后钉了它，据我所知，我必须在OUTER加入它们之前对子连接进行子查询，否则不是分组/求和，它们将为返回的每条记录求和。我知道可怕的解释，但这是最终结果查询。感谢任何看过的人。
SELECT dbo.tblProducts.PartNo, 'FME' AS Branch, SUM(sOh.Weight) AS SOHWeight, SUM(sOh.Quantity) AS SOHQty,
ReservedQty, SOOEa,SOOTo
,sum(IIF(SoH.TYPE IN ('C','SC'),SoH.COST*SoH.WEIGHT,SoH.COST*SoH.QUANTITY)+soh.PROCESSINGCOST+soh.PROCESSINGFREIGHT+soh.Packaging)/SUM(IIF(SoH.TYPE IN ('C','SC'),sOh.weight,sOh.Quantity)) AS AvgCost
,tblProducts.type,tblProducts.product,tblProducts.grade,tblProducts.coating,tblProducts.finish,tblProducts.thickness,tblProducts.width,tblProducts.length,tblProducts.dim1,tblProducts.dim2,tblProducts.Notes,tblProducts.ClassFBR,tblProducts.ClassFME,tblProducts.ClassFSY
,SUM(IIF(SoH.STATUS='SC',SoH.QUANTITY,NULL)) AS AltoQty
FROM
dbo.tblProducts
LEFT OUTER JOIN
dbo.tblStockOnHand SoH
ON tblProducts.PartNo = SOH.ProductDesc AND SoH.Status IN ('I', 'R','SC') AND SoH.branch='FME'
LEFT OUTER JOIN
(SELECT SUM(tblReserveDetail.Quantity) AS ReservedQty, ProductDesc
FROM dbo.tblReserveDetail INNER JOIN tblReserveHeader ON dbo.tblReserveHeader.ID = dbo.tblReserveDetail.ReserveID INNER JOIN tblStockOnHand ON tblReserveDetail.PacknoID=tblStockOnHand.PackNoID
WHERE tblReserveHeader.Completed=0 AND tblReserveHeader.Cancelled =0 AND BRANCH='FME'
GROUP BY ProductDesc) RES
ON SoH.ProductDesc = RES.ProductDesc
LEFT OUTER JOIN
(SELECT tblPurchaseOrderDetail.ProductDesc,SUM(iif(QuantityUnit='TO',null,QuantityAmount)) AS SOOEa,SUM(iif(QuantityUnit='TO',QuantityAmount,null)) AS SOOTo
FROM tblPurchaseOrderDetail WHERE
(dbo.tblPurchaseOrderDetail.Status = N'O' OR dbo.tblPurchaseOrderDetail.Status = N'PD') AND tblPurchaseOrderDetail.branch='FME'
GROUP BY tblPurchaseOrderDetail.ProductDesc) PoD
ON PoD.ProductDesc = dbo.tblProducts.PartNo
GROUP BY dbo.tblProducts.PartNo,tblProducts.type,tblProducts.product,tblProducts.grade,tblProducts.coating,tblProducts.finish,tblProducts.thickness,tblProducts.width,tblProducts.length,tblProducts.dim1,tblProducts.dim2,tblProducts.Notes,tblProducts.ClassFBR,tblProducts.ClassFME,tblProducts.ClassFSY,SOOEa,SOOTo,ReservedQty