题解 | #返回顾客名称和相关订单号以及每个订单的总价#
返回顾客名称和相关订单号以及每个订单的总价
https://www.nowcoder.com/practice/4dda66e385c443d8a11570a70807d250
select
a.cust_name,
b.order_num,
c.OrderTotal
from
Customers a
left join
Orders b on a.cust_id = b.cust_id
left join
(
select
order_num,
sum(quantity * item_price) as OrderTotal
from
OrderItems
group by
1
) c on b.order_num = c.order_num
order by
1,2
