题解 | #返回每个顾客不同订单的总金额#
返回每个顾客不同订单的总金额
https://www.nowcoder.com/practice/ce313253a81c4947b20e801cd4da7894
SELECT cust_id, sum(item_price * quantity) as total_ordered FROM Orders JOIN OrderItems ON Orders.order_num = OrderItems.order_num GROUP BY cust_id ORDER BY total_ordered DESC
