题解 | #返回订单数量总和不小于100的所有订单的订单号#
返回订单数量总和不小于100的所有订单的订单号
https://www.nowcoder.com/practice/ff77e82b59544a15987324e19488aafd
select order_num from OrderItems group by order_num having sum(quantity)>=100 order by order_num
知识点：
1、在上题增加了having的使用
2、注意orderby的顺序仍然是在最后
