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
http://www.nowcoder.com/practice/ce313253a81c4947b20e801cd4da7894
select cust_id,
( select sum(item_price*quantity)
from OrderItems
where OrderItems.order_num=Orders.order_num) as total_ordered
from Orders
order by total_ordered desc;
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