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 as o
left join OrderItems as oi on o.order_num = oi.order_num
group by cust_id
order by total_ordered desc
left join OrderItems as oi on o.order_num = oi.order_num
group by cust_id
order by total_ordered desc
