SQL服務器之和計算

Question

我有兩個表：

訂單：

1. 訂單ID
2. 的OrderTotal
3. 狀態

orderStatesHistory

1. 號
2. 訂單ID
3. STATEID

我需要顯示得到顯示這樣的結果。

現在我的代碼是這樣的，我使用的SQL Server

WITH totalOrders AS 
 
    (
 
    SELECT orders.state, COUNT(1) AS counter, SUM(orders.orderTotal) AS total 
 
    FROM orders 
 
    CROSS APPLY 
 
    (
 
     SELECT orderId, currentDateTime FROM orderStatesHistory 
 
     WHERE (orderStatesHistory.stateId = 1 OR orderStatesHistory.stateId = 3) 
 
     AND NULLIF(orderStatesHistory.subStateId, 0) IS NULL 
 
     AND orderStatesHistory.currentDateTime BETWEEN '2015-07-28 00:00:00' AND '2015-08-04 00:00:00'  
 
     AND orders.id = orderStatesHistory.orderId 
 
    ) AS statesHistory 
 
    WHERE orders.state IN (1,2,3,4,5) 
 
    AND orders.documentType = 1 
 
    GROUP BY orders.state 
 
) 
 
    SELECT 9999 AS state, SUM(counter) AS counter, SUM(total) AS total 
 
    FROM totalOrders 
 

 
    UNION 
 
    
 
    SELECT state, counter, total 
 
    FROM totalOrders

問題是不知何故，在orderStatesHistory登記可能會被複制，而我只想要在「count（）」和「sum（）」中使用每個orderId一次

我一直在努力非常難，不知道我是否可以用SQL來完成這一切，也許有些天才能幫助我，如果不是，我會通過軟件來完成。注意：當我執行count（）和sum（）時，我只想使用一次每個orderId，如果它們重複，我不想對它們進行計數。

任何幫助都是有好處的，甚至有人說這是不可能的。

PD：如果需要，我願意使用JOINS，不需要使用SQL Server特定的語言。

更新1：

數據在orderStatesHistory

數據訂單

Answer 1

您應該能夠使用來實現這個JOIN和DISTINCT代替CROSS APPLY。如果您可以發佈一些示例數據，這將有助於驗證。

WITH totalOrders AS 
 
    (
 
    SELECT orders.state, COUNT(1) AS counter, SUM(orders.orderTotal) AS total 
 
    FROM orders 
 
    INNER JOIN 
 
    (
 
     SELECT DISTINCT orderId FROM orderStatesHistory 
 
     WHERE (orderStatesHistory.stateId = 1 OR orderStatesHistory.stateId = 3) 
 
     AND NULLIF(orderStatesHistory.subStateId, 0) IS NULL 
 
     AND orderStatesHistory.currentDateTime BETWEEN '2015-07-28 00:00:00' AND '2015-08-04 00:00:00' 
 
    ) AS statesHistory 
 
    ON orders.id = statesHistory.orderId 
 
    WHERE orders.state IN (1,2,3,4,5) 
 
    AND orders.documentType = 1 
 
    GROUP BY orders.state 
 
) 
 
    SELECT 9999 AS state, SUM(counter) AS counter, SUM(total) AS total 
 
    FROM totalOrders 
 

 
    UNION 
 
    
 
    SELECT state, counter, total 
 
    FROM totalOrders