题解 | #返回顾客名称和相关订单号以及每个订单的总价#
返回顾客名称和相关订单号以及每个订单的总价
http://www.nowcoder.com/practice/4dda66e385c443d8a11570a70807d250
SELECT a.cust_name,b.order_num,SUM(c.quantity*c.item_price) AS OrderTotal FROM Customers a INNER JOIN Orders b ON a.cust_id=b.cust_id INNER JOIN OrderItems c ON b.order_num = c.order_num GROUP BY a.cust_name,b.order_num ORDER BY a.cust_name,b.order_num;
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