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
三个表如何进行inner join? 前两个inner join on，第三个直接逗号,然后用where连接外码。total_price >= 1000含有聚合函数（sum, avg, count等），所以要用having
select cust_name, sum(oi.item_price * oi.quantity) as total_price from Customers c inner join Orders o on c.cust_id = o.cust_id, OrderItems oi where oi.order_num = o.order_num group by cust_name having total_price >= 1000 order by total_price asc
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