Question

我想将这两个查询的结果放在一起，但无法弄清楚如何将它们组合起来。目标是按产品获得每月的总销售额。我有店内购买和在线订单。这是第一个从在线订单中获得每月总销售额的查询：

SELECT YEAR( orderDate ) AS "SalesYear"
     , MONTH( orderDate ) AS "SalesMonth"
     , SUM( orderTotal ) AS "TotalSales"
     , products.productID 
FROM orders
INNER JOIN orderdetails ON orders.orderID = orderDetails.orderID
INNER JOIN products ON orderDetails.productID = products.productID
GROUP BY productID, YEAR( orderDate ) , MONTH( orderDate )
ORDER BY YEAR( orderDate ) , MONTH( orderDate )

以下是按商店购买的产品检索每月总销售额的查询：

SELECT YEAR( orderDate ) AS "SalesYear"
    , MONTH( orderDate ) AS "SalesMonth"
    , SUM( orderTotal ) AS "TotalSales"
    , products.productID 
FROM in_storepurchase
INNER JOIN instorepurchasedetails 
   ON in_storepurchase.isPurchaseID = instorepurchasedetails.isPurchaseID
INNER JOIN products 
   ON instorepurchasedetails.productID = products.productID
 GROUP BY productID, YEAR( orderDate ) , MONTH( orderDate )
 ORDER BY YEAR( orderDate ) , MONTH( orderDate )

有关如何将其纳入一个查询的任何帮助，以便我可以在一张桌子上获得所有结果，我们将不胜感激。

Answer 1

当然，您可以使用UNION：

SELECT 
    YEAR( t.orderDate ) AS "SalesYear", MONTH( t.orderDate ) AS "SalesMonth", SUM( t.orderTotal ) AS "TotalSales", productID
FROM
(
 select 1 
     UNION ALL
 select 2 
) as t
GROUP BY
    t.productID, YEAR( t.orderDate ) , MONTH( t.orderDate )

MySQL我可以将这两个查询合并在一起吗？

1 个答案: