题解 | #确定最佳顾客的另一种方式（二）#
确定最佳顾客的另一种方式（二）
https://www.nowcoder.com/practice/b5766f970ae64ac7944f37f5b47107aa
select cust_name,sum(item_price*quantity) as total_price from Customers inner join Orders on Customers.cust_id = Orders.cust_id inner join OrderItems on Orders.order_num = OrderItems.order_num group by cust_name having total_price > 1000 order by total_price
一个客户对应多个订单的情况，属于1对多，最后计算客户的订单时用group by分组
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