题解 | #2021年11月每天的人均浏览文章时长#
2021年11月每天的人均浏览文章时长
https://www.nowcoder.com/practice/8e33da493a704d3da15432e4a0b61bb3
select dt, round(avg(每个用户总浏览时长),1) avg_viiew_len_sec
from
(select date(in_time) dt, uid, sum(timestampdiff(second,in_time,out_time)) 每个用户总浏览时长
from tb_user_log
where year(in_time) = 2021 and month(in_time) = 11 and artical_id!=0
group by date(in_time),uid) a
group by dt
order by avg_viiew_len_sec
