在SQL中有子查詢和派生表的問題

我對SQL仍然非常陌生，最近幾天在這些特定子查詢中遇到了問題。在SQL中有子查詢和派生表的問題

這一個應該返回3列，只返回來自「CA」供應商的記錄，並使用派生表。

-- Query 6 
SELECT VendorID, VendorName, Vendors.VendorState 
FROM Vendors 
JOIN (SELECT VendorState 
     FROM Vendors) AS SubVendors ON Vendors.VendorID = SubVendors.VendorID 
WHERE Vendors.VendorState = 'CA' 
ORDER BY VendorID;

但是當我運行它，我得到這個錯誤：

Msg 207, Level 16, State 1, Line 6
Invalid column name 'VendorID'.

這一個返回4列，也使用派生表，子查詢的「FROM子句中的編碼。

-- Query 7 
SELECT 
    InvoicesMain.VendorID, 
    MAX(InvoiceTotal) AS MaxInvoice, 
    MIN(InvoiceTotal) AS MinInvoice, 
    AVG(InvoiceTotal) AS AvgInvoice 
FROM 
    Invoices AS InvoiceMain 
JOIN 
    (SELECT TOP 10 
     VendorID, AVG(InvoiceTotal) AS AvgInvoice 
    FROM Invoices 
    GROUP BY VendorID 
    ORDER BY AvgInvoice DESC) AS TopVendor ON InvoicesMain.VendorID = TopVendor.VendorID) 
GROUP 
    InvoicesMain.VendorID 
ORDER BY 
    MaxInvoice DESC;

但我得到這個錯誤：

Msg 102, Level 15, State 1, Line 9
Incorrect syntax near ')'.

最後，我真的不知道如何做到這一點的一個;它應該重新作爲子查詢：

SELECT 
    InvoiceNumber, InvoiceDate, InvoiceLineItemAmount 
FROM 
    Invoices 
JOIN 
    InvoiceLineItems ON Invoices.InvoiceID = Invoicelineitems.InvoiceID 
WHERE 
    VendorID = 122 
ORDER BY 
    InvoiceDate;

請提供任何提示？

來源

2016-02-26 Pau808

你的第一個查詢不選擇在SubVendors查詢供應商ID恢復此爲子查詢，但你正試圖加入它。您的第二個查詢在需要刪除的連接後有一個額外的支架。第三個問題是什麼？作爲一個子查詢，您只需要按語句刪除該命令，如果需要排序，則在子查詢之外執行。 – ZLK

在查詢6上，您沒有在子查詢上選擇VendorID，這就是錯誤發生的原因。試試這個查詢，而不是：

SELECT VendorID, VendorName, Vendors.VendorState 
FROM Vendors JOIN 
(SELECT VendorState, VendorID 
FROM Vendors) AS SubVendors 
ON Vendors.VendorID = SubVendors.VendorID 
WHERE V.VendorState = 'CA' 
ORDER BY VendorID;

查詢7你只是缺少你的子查詢)。

SELECT InvoicesMain.VendorID, MAX(InvoiceTotal) AS MaxInvoice, MIN(InvoiceTotal) AS MinInvoice, AVG(InvoiceTotal) AS AvgInvoice 
FROM Invoices AS InvoiceMain 
JOIN 
(SELECT TOP 10 VendorID, AVG(InvoiceTotal)) AS AvgInvoice 
FROM Invoices 
GROUP BY VendorID 
ORDER BY AvgInvoice DESC) AS TopVendor 
ON InvoicesMain.VendorID = TopVendor.VendorID) 
GROUP InvoicesMain.VendorID 
ORDER BY MaxInvoice DESC;

對於最後一個項目，你可以通過從表InvoiceLineItems選擇InvoiceID就像在查詢6

SELECT InvoiceNumber, InvoiceDate, InvoiceLineItemAmount 
FROM Invoices JOIN 
(SELECT InvoiceID FROM Invoicelineitems) As I 
ON Invoices.InvoiceID = I.InvoiceID 
WHERE VendorID = 122 
ORDER BY InvoiceDate;

來源

2016-02-26 01:00:36 kaonashi

在SQL中有子查詢和派生表的問題

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