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,
(
select
sum(item_price * quantity)
from
OrderItems a
where a.order_num = b.order_num
) as total_ordered
from
Orders b
order by total_ordered desc
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