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
代码如下: 先从OrderItems求出order_num和 total_ordered再根据order_num 和Orders用表连接查询求出结果 select cust_id,total_ordered from (select order_num,sum(item_price*quantity)total_ordered from OrderItems group by order_num)a join Orders b on a.order_num=b.order_num order by total_ordered desc
