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 t1.cust_id, t2.total_ordered from Orders t1 left join (select order_num, sum(item_price*quantity) total_ordered from OrderItems group by order_num) as t2 on t1.order_num=t2.order_num order by t2.total_ordered desc;
是不是还挺好理解的
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