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