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
from (
select order_num,sum(item_price*quantity)
as total_ordered
from
OrderItems
group by order_num
)as oo inner join Orders as orde on
oo.order_num=orde.order_num
order by total_ordered desc
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