在sql中獲得不同的記錄

我已經撰寫了以下查詢以獲取客戶電子郵件地址，ordercount（客戶已下達多少訂單），訂單的總價格。但我得到重複的結果。在sql中獲得不同的記錄

我想有不同的記錄，如：

 
Customer A, 5 orders, $125 total 
Customer B, 2 orders, $150 total

，但我得到的結果類似：

 
Customer A, 4 orders, $100 total 
Customer A, 1 order, $25 total 
Customer B, 1 order, $100 total 
Customer B, 1 order, $50 total

能否請你幫我，我怎麼能知道檢查結果，因爲我想要的。我寫了下面的查詢：

Select 
    customers.CustomerID, 
    customers.EmailAddress, 
    COUNT(Orders.OrderID) AS Ordercount, 
    Sum(OrderDetails.TotalPrice * OrderDetails.Quantity) AS TotalPrice 
from 
    customers 
    INNER JOIN Orders ON customers.CustomerID = Orders.CustomerID 
    INNER JOIN OrderDetails ON OrderDetails.OrderID = Orders.OrderID 
GROUP BY 
    customers.CustomerID, 
    customers.EmailAddress, 
    Orders.OrderID, 
    OrderDetails.TotalPrice, 
    OrderDetails.Quantity 
ORDER BY customers.CustomerID, orders.OrderID desc

來源

2012-02-08 user818671

爲什麼你的團隊中有customerID，但不要選擇它？ – 2012-02-08 10:45:36

對不起，我發佈錯誤的查詢我的查詢ia，如下所示：選擇customers.CustomerID，customers.EmailAddress，COUNT（Orders.OrderID）AS Ordercount，Sum（OrderDetails.TotalPrice * OrderDetails.Quantity）AS TotalPrice from customers INNER JOIN Orders ON customers .CustomerID = Orders.CustomerID INNER JOIN OrderDetails ON OrderDetails.OrderID = Orders.OrderID GROUP BY customers.CustomerID，customers.EmailAddress，Orders.OrderID，OrderDetails.TotalPrice，OrderDetails.Quantity ORDER BY customers.CustomerID，orders.OrderID desc – user818671 2012-02-08 10:50:20

你只需要group by這是在選擇，而不是部分領域一個COUNT或SUM

Select 
    customers.CustomerID, 
    customers.EmailAddress, 
    COUNT(Orders.OrderID) AS Ordercount, 
    Sum(OrderDetails.TotalPrice * OrderDetails.Quantity) AS TotalPrice 
from 
    customers 
    INNER JOIN 
    Orders ON customers.CustomerID = Orders.CustomerID 
    INNER JOIN 
    OrderDetails ON OrderDetails.OrderID = Orders.OrderID 
GROUP BY 
    customers.CustomerID, 
    customers.EmailAddress 
ORDER BY 
    customers.CustomerID desc

來源

2012-02-08 10:54:21

但我得到以下錯誤：ORDER BY子句中的「Orders.OrderID」列無效，因爲它不包含在聚合函數或GROUP BY子句中。如果我不包括它。 – user818671 2012-02-08 10:59:00

確定只是由客戶ID命令。或者按COUNT（Orders.OrderID）排序，如果您想要頂部 – 2012-02-08 11:01:05

的大部分訂單，那麼它正在工作。謝謝 – user818671 2012-02-08 11:23:36

的問題仍然在GROUP BY部分，嘗試這樣的：

Select customers.CustomerID, 
     customers.EmailAddress, 
     COUNT(Orders.OrderID) AS Ordercount, 
     Sum(OrderDetails.TotalPrice * OrderDetails.Quantity) AS TotalPrice 
from customers 
INNER JOIN Orders ON customers.CustomerID = Orders.CustomerID 
INNER JOIN OrderDetails ON OrderDetails.OrderID = Orders.OrderID 
GROUP BY customers.CustomerID, 
     customers.EmailAddress 
ORDER BY customers.CustomerID, COUNT(Orders.OrderID) desc

來源

2012-02-08 10:46:06

我發佈了錯誤的查詢，你可以檢查評論中正確的查詢上面。 – user818671 2012-02-08 10:53:11

@ user818671立即嘗試:) – 2012-02-08 10:57:14

我收到以下錯誤：ORDER BY子句中的「Orders.OrderID」列無效，因爲它不包含在聚合函數或GROUP BY子句中。 – user818671 2012-02-08 11:00:51

分組和排序方式，如訂單ID列的問題 - 嘗試：

Select customers.CustomerID, 
     max(customers.EmailAddress) AS EmailAddress, 
     COUNT(Orders.OrderID) AS Ordercount, 
     Sum(OrderDetails.TotalPrice * OrderDetails.Quantity) AS TotalPrice 
from customers 
INNER JOIN Orders ON customers.CustomerID = Orders.CustomerID 
INNER JOIN OrderDetails ON OrderDetails.OrderID = Orders.OrderID 
GROUP BY customers.CustomerID 
ORDER BY customers.CustomerID

來源

2012-02-08 10:59:47

上面的查詢也起作用。謝謝 – user818671 2012-02-08 11:24:53

在sql中獲得不同的記錄

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