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 (select order_num,sum(quantity) over (partition by order_num order by quantity) as sum1 from OrderItems ) t1 where sum1>=100 order by order_num 利用窗口函数
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