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(oi.item_price * oi.quantity) as total_ordered from Orders o left join OrderItems oi on o.order_num = oi.order_num group by cust_id order by total_ordered desc
