SQL服务器总和和计数

Question

我有两张桌子：

订单：

1. 订单ID
2. 的OrderTotal
3. 状态

orderStatesHistory

1. ID
2. 订单ID
3. STATEID

我需要显示get来显示这样的结果。



现在我的代码就是这个，我使用的是SQL Server

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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
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问题是某种程度上，orderStatesHistory中的注册表可能是重复的，我只想在＆＃34; count（）＆＃34;中使用每个orderId一次。和＆＃34; sum（）＆＃34;

我一直在努力奋斗，不确定我是否能用SQL完成所有工作，也许有些天才帮助我，如果不是我会通过软件完成。

注意：当我执行count（）和sum（）时，我想每次orderId只使用一次，如果它们是重复的，我不想计算它们。

任何帮助都是有帮助的，甚至有人说这是不可能的。

PD：如果需要，我愿意使用JOINS，不需要使用SQL服务器专用语言。

更新1：

orderStatesHistory中的数据

订单中的数据

Answer 1

您应该可以使用JOIN和DISTINCT代替CROSS APPLY来完成此操作。如果你可以发布一些样本数据，那将有助于验证。

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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

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