涉及四路加入的SQL查詢

試圖爲MSSQL練習創建4路查詢。讓我簡單描述表格：涉及四路加入的SQL查詢

4個主表，供應商（供應商詳細信息，pk vendorId），發票（發票詳細信息pk InvoiceId，fk VendorID），InvoiceLineItems（I）和GlAccounts（accountNo pk）。

查詢：編寫一條SELECT語句，返回四列：VendorName，AccountDescription，LineItemCount和LineItemSum。 LineItemCount是行數，並LineItemSum是InvoiceLineItemAmount列

我的解決方案的總和：

SELECT Vendors.VendorName, GLAccounts.AccountDescription, 
    SUM(InvoiceLineItems.InvoiceLineItemAmount) as LineItemSum, 
    Count (InvoiceLineItems.InvoiceID) as LineItemCount 
FROM Vendors INNER JOIN Invoices 
ON Vendors.VendorID = Invoices.VendorID 
INNER JOIN InvoiceLineItems 
    ON Invoices.InvoiceID = InvoiceLineItems.InvoiceID 
INNER JOIN GLAccounts 
    ON InvoiceLineItems.AccountNo = GLAccounts.AccountNo 
ORDER BY Vendors.VendorName

問題：

消息8120，級別16，狀態1，行列'Vendors.VendorName'在選擇列表中無效，因爲它不包含在聚合函數或GROUP BY子句中。

的窘境：

不知道爲什麼這個問題發生，因爲很清楚我在集團提Vendors.VendorName By子句。我懷疑它與我正在執行的內部連接有關，因爲它們是多個，我必須有錯誤。

任何人都可以發現這裏有什麼問題嗎？

來源

2011-05-30 Parijat

如果你有多個總帳科目的發票多個行項目，什麼應返回：用逗號分隔的列表？ – Thomas 2011-05-30 23:41:07

你明確提到它在哪個* GROUP BY條款中？ – Phil 2011-05-30 23:42:53

添加GROUP BY Vendors.VendorName，GLAccounts.AccountDescription

來源

2011-05-30 23:40:44

嘗試

SELECT Vendors.VendorName, GLAccounts.AccountDescription, SUM(InvoiceLineItems.InvoiceLineItemAmount) as LineItemSum, Count (InvoiceLineItems.InvoiceID) as LineItemCount FROM Vendors INNER JOIN Invoices ON Vendors.VendorID = Invoices.VendorID INNER JOIN InvoiceLineItems ON Invoices.InvoiceID = InvoiceLineItems.InvoiceID INNER JOIN GLAccounts ON InvoiceLineItems.AccountNo = GLAccounts.AccountNo Group By Vendors.VendorName, GLAccounts.AccountDescription ORDER BY Vendors.VendorName.

Sum, Count, Avg etc都是集合函數，所以記錄有一定的標準進行分組，以執行這些操作。

來源

2011-05-30 23:41:30

由於您彙總（彙總）InvoiceLineItemAmount和InvoiceID到一個結果每個VendorName，你還需要爲VendorName和AccountDescription列做同樣的。只需在您的查詢結尾添加一個

GROUP BY Vendors.VendorName, GLAccounts.AccountDescription

。

來源

2011-05-30 23:44:27 slugster

我們必須說明您在同一張發票上有多個gl賬戶值的可能性。爲此，我們需要使用一個子查詢，它將給我們一個這些帳號的分隔列表。另外，建議您爲單張發票執行此操作？如果是的話，結果可能是：

Select V.VendorName 
    , Stuff(
     (
     Select ', ' + GA1.AccountDescription 
     From InvoiceLineItems As LI1 
      Join GLAccounts As GA1 
       On GA1.AccountNo = LI1.AccountNo 
     Where LI1.InvoiceId = I.InvoiceId 
     Group By GA1.AccountDescription 
     Order By GA1.AccountDescription 
     ).value('.', 'nvarchar(max)'), 1, 2, '') As AccountDescriptions 
    , Coalesce(LineItemInfo.ItemCount, 0) As LineItemCount 
    , Coalesce(LineItemInfo.AmountTotal, 0) As LineItemSum 
From Vendors As V 
    Join Invoices As I 
     On I.vendorid = V.vendorid 
    Left Join (
       Select LI2.InvoiceId 
        , Count(*) As ItemCount 
        , Sum(LI2.Amount) As AmountTotal 
       From InvoiceLineItems As LI2 
       Group By LI2.InvoiceId 
       ) As LineItemInfo 
     On LineItemInfo.InvoiceId = I.InvoiceId 
Where I.InvoiceId = @SomeInvoiceId

來源

2011-05-30 23:47:26 Thomas

涉及四路加入的SQL查詢

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