Question

我有这个架构。我只对ItemNumber和ExternalInvoiceNUmber感兴趣。使用下面的代码

   Select
   StockItem.ItemNumber,
   PurchaseItem.Quantity,
    Purchase.ExternalInvoiceNumber,
    PurchaseItem.Delivered
     From
        StockItem Left Join
        PurchaseItem On PurchaseItem.fkStockItemId = StockItem.pkStockItemID Left Join
         Purchase On Purchase.pkPurchaseID = PurchaseItem.fkPurchasId

结果并不完全是我想要的

           ItemNumber  Quantity  ExternalInvoiceNumber  Delivered
            item1        10         PO9993                10 
            item1        10         PO9994                0
            item1        10         PO9995                0

问题是我不希望任何包含项目记录的结果已经传递。我试着使用代码

         where      PurchaseItem.Delivered <> '0'

但是它不会显示任何只有1个externaminvoicenumber且已经交付的物品。基本上，我想要的是mssql不显示任何已传递的记录。但是，如果已交付采购订单，那么它应显示具有空白数量的项目和空白的外部资产。一个星期以来，我一直在讨论这个问题。你能帮我吗？

Answer 1

您需要在JOIN条件下进行过滤。

在WHERE中，它变为INNER JOIN

...
Left Join
PurchaseItem On 
          PurchaseItem.fkStockItemId = StockItem.pkStockItemID
          AND PurchaseItem.Delivered <> '0'
Left Join
...

或者，我喜欢分开JOIN和过滤器

的样式

...
Left Join
(SELECT * FROM PurchaseItem WHERE Delivered <> '0') PurchaseItem 
        On  PurchaseItem.fkStockItemId = StockItem.pkStockItemID
Left Join
...

Answer 2

WITH DeliveredInvoice AS
    (SELECT StockItem.ItemNumber as item, 0 as quant, 
        0 as ein, 0 as del
        FROM StockItem 
        JOIN PurchaseItem ON PurchaseItem.fkStockItemId = StockItem.pkStockItemId
        JOIN Purchase ON Purchase.pkPurchaseId = PurchaseItem.fkPurchaseId
        WHERE PurchaseItem.Quantity > 0
        AND PurchaseItem.Quantity = PurchaseItem.Delivered),
    UndeliveredInvoice AS
    (SELECT StockItem.ItemNumber as item, PurchasedItem.Quantity as quant, Purchase.ExternalInvoiceNumber as ein, 
        PurchaseItem.Delivered as del
        FROM StockItem 
            JOIN PurchaseItem ON PurchaseItem.fkStockItemId = StockItem.pkStockItemId
            JOIN Purchase ON Purchase.pkPurchaseId = PurchaseItem.fkPurchaseId
        WHERE PurchaseItem.Delivered = 0)

SELECT item, quant, ein, del
FROM UndeliveredInvoice

UNION

SELECT item, quant, ein, del
FROM UndeliveredInvoice
WHERE item NOT IN (select distinct item from UndeliveredInvoice)

无法从多个表中获取结果

2 个答案: