题解 | 统计用户获得积分
统计用户获得积分
https://www.nowcoder.com/practice/22ed0cd240824bb597b3130fef389cea
select user_id, sum(floor(timestampdiff(minute,visit_time,leave_time)/10)) point from visit_tb group by user_id order by point desc; 刚开始用round取0位，发现3.5会上取，还是要用地板函数
