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; 要根据SQL执行顺序,不能用where,而是用having,分组后再筛选
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