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 OrderItems as a join Orders as b on a.order_num=b.order_num group by cust_id order by total_ordered desc
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