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,total_order
from Orders a
inner join
(select order_num,sum(item_price * quantity) total_order
from OrderItems
group by order_num) b
on a.order_num = b.order_num
order by total_order desc;
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