MySQL我可以將這兩個查詢合併在一起嗎？

Question

我想一起得到這兩個查詢的結果，但無法弄清楚如何合併它們。目標是按產品獲得每月的總銷售額。我有店內購物和在線訂單。這是第一個查詢，從網上訂單每月獲得的總銷售額：

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) 

下面是從商店購買獲取每月總銷售額按產品查詢：

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) 

任何幫助的我如何能夠將這個查詢放入一個查詢中，以便我可以在單個表上獲得所有結果，我們將不勝感激。

Answer 1

當然，你可以使用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)