sqlc中的分配数量

我有一个问题，期待帮助，或想法或任何搜索关键字，可以帮助我找到以下问题的解决方案： 我有两个表，一个包含导入信息，一个包含导出信息

tblImport (iCode, ComponentCode, iTotal)
tblExport (eCode, ProductCode, ComponentCode, eNum)

要求：我必须创建一个包含eCode的表，该表包含每个组件代码的枚举 当sumeNum=iTotal时。请看图片

第3列是我想要的结果，在该列中，5=iTotal-sum eNum除以iCode，eCode。条件是每组iCode、eCode、ComponentCode只显示一次。这意味着我分配的行将被忽略。 这里的问题是，如果tblImport通过ComponentCode连接tblExport，那么这将不是真的，会有重复的行

我可以在SQL中实现它吗？如果是这样，请让我知道技术上可能做到这一点。 如果没有，请告诉我如何在SQL或C中实现它。 从谷歌翻译 谢谢大家。

我做到了

CREATE TABLE Orders
    ([OrderID] int, [Item] varchar(3), [Quantity] int)
;

INSERT INTO Orders
    ([OrderID], [Item], [Quantity])
VALUES
    (1, 'pen', 80),
    (2, 'pen', 30),
    (3, 'pen', 25)
;

CREATE TABLE Inventory
    ([InvID] int, [Lot] varchar(3), [Item] varchar(3), [Quantity] int)
;

INSERT INTO Inventory
    ([InvID], [Lot], [Item], [Quantity])
VALUES
    (1, '001', 'pen', 100),
    (2, '002', 'pen', 20),
    (3, '003', 'pen', 30)
;



INSERT INTO dbo.Inventory  VALUES  ( 4, '001','Ink',50 )
INSERT INTO dbo.Inventory  VALUES  ( 5, '002','Ink',50 )
INSERT INTO Orders VALUES (4, 'Ink', 30)
INSERT INTO Orders VALUES (5, 'Ink', 60)



    WITH CTE_Orders AS 
(
    SELECT *, ROW_NUMBER() OVER (PARTITION BY Item ORDER BY OrderID) AS RN
    FROM dbo.Orders
)
, CTE_Inventory AS 
(
    SELECT *, ROW_NUMBER() OVER (PARTITION BY Item ORDER BY InvID) AS RN
    FROM dbo.Inventory
)
, CTE AS 
(
    SELECT  o.RN AS OrderRN,
            inv.RN AS InvRN,
            OrderID ,
            o.Item ,
            o.Quantity AS OrderedQuantity ,
            InvID ,
            Lot ,
            inv.Quantity AS InvQuantity,
            CASE WHEN inv.Quantity - o.Quantity > 0 THEN o.Quantity  ELSE inv.Quantity END AS ServedQuantity ,
            CASE WHEN inv.Quantity - o.Quantity > 0 THEN 0 ELSE o.Quantity - inv.Quantity END AS LeftToServe,
            CASE WHEN inv.Quantity - o.Quantity > 0 THEN inv.Quantity - o.Quantity ELSE 0 END AS LeftInLot
    FROM CTE_Orders o
    INNER JOIN CTE_Inventory inv ON o.Item = inv.Item
    --WHERE OrderID = 1 AND InvID = 1
    WHERE o.RN =1 AND inv.RN = 1
    UNION ALL
    SELECT  CASE WHEN c1.LeftInLot <=0 THEN c1.OrderRN ELSE c2.OrderRN END AS OrderRN
            ,CASE WHEN c1.LeftInLot <=0 THEN c2.InvRN ELSE c1.InvRN END AS InvRN
            ,CASE WHEN c1.LeftInLot <=0 THEN c1.OrderID ELSE c2.OrderID END AS OrderID
            ,CASE WHEN c1.LeftInLot <=0 THEN c1.Item ELSE c2.Item END AS Item
            ,CASE WHEN c1.LeftInLot <=0 THEN c1.OrderedQuantity ELSE  c2.OrderedQuantity END AS OrderedQuantity
            ,CASE WHEN c1.LeftInLot <=0 THEN c2.InvID ELSE c1.InvID END AS InvID
            ,CASE WHEN c1.LeftInLot <=0 THEN c2.Lot ELSE c1.Lot END AS Lot
            ,CASE WHEN c1.LeftInLot <=0 THEN c2.InvQuantity ELSE c1.LeftInLot END AS InvQuantity
            ,CASE WHEN CASE WHEN c1.LeftInLot <=0 THEN c2.InvQuantity ELSE c1.LeftInLot END - CASE WHEN c1.LeftInLot <=0 THEN c1.LeftToServe ELSE c2.OrderedQuantity END > 0
                  THEN CASE WHEN c1.LeftInLot <=0 THEN c1.LeftToServe ELSE c2.OrderedQuantity END
                  ELSE CASE WHEN c1.LeftInLot <=0 THEN c2.InvQuantity ELSE c1.LeftInLot END
             END AS ServedQuantity
            ,CASE WHEN CASE WHEN c1.LeftInLot <=0 THEN c2.InvQuantity ELSE c1.LeftInLot END - CASE WHEN c1.LeftInLot <=0 THEN c1.LeftToServe ELSE c2.OrderedQuantity END > 0
                  THEN 0
                  ELSE CASE WHEN c1.LeftInLot <=0 THEN c1.LeftToServe ELSE  c2.OrderedQuantity END - CASE WHEN c1.LeftInLot <=0 THEN c2.InvQuantity ELSE c1.LeftInLot END  
             END AS LeftToServe
            ,CASE WHEN CASE WHEN c1.LeftInLot <=0 THEN c2.InvQuantity ELSE c1.LeftInLot END - CASE WHEN c1.LeftInLot <=0 THEN c1.LeftToServe ELSE c2.OrderedQuantity END > 0
                  THEN  CASE WHEN c1.LeftInLot <=0 THEN c2.InvQuantity ELSE c1.LeftInLot END - CASE WHEN c1.LeftInLot <=0 THEN c1.LeftToServe ELSE  c2.OrderedQuantity END 
                  ELSE 0 
             END AS LeftInLot
    FROM CTE c1
    INNER JOIN 
    (
        SELECT  o2.RN AS OrderRN,
                inv2.RN AS InvRN,
                InvID ,
                Lot ,
                inv2.Item ,
                inv2.Quantity AS InvQuantity,
                OrderID ,
                o2.Quantity AS OrderedQuantity
        FROM 
        CTE_Inventory inv2 
        INNER JOIN CTE_Orders o2 ON inv2.Item = o2.Item
    ) c2
    ON c1.Item = c2.Item AND
    ((c2.InvRN = c1.InvRN + 1 AND c2.OrderRN = c1.OrderRN AND c1.LeftInLot <= 0 ) OR (c2.OrderRN = c1.OrderRN + 1 AND c2.InvRN = c1.InvRN AND c1.LeftInLot>0))

)
SELECT * FROM CTE
ORDER BY item,OrderID

成功了

---

Tks

这不是一个有用的答案，任何人访问该网站后-它不会提供任何信息以外，只是一个链接。请在答案中显示代码，并添加有用的解释。我还要删除C标签，因为这与C无关。嗯，为什么不呢？应该是绝对好的。