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
b.cust_id,
sum(a.item_price * a.quantity) as total_ordered
from
OrderItems a
left join
Orders b on a.order_num = b.order_num
where
b.cust_id is not null
group by
1
order by
total_ordered desc
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