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 date(in_time) as dt, round(sum(timestampdiff(second, in_time, out_time)) / count(distinct uid), 1) as avg_viiew_len_sec from tb_user_log where date(in_time) >= '2021-11-01' and date(in_time) <= '2021-12-01' and artical_id != 0 group by date(in_time) order by avg_viiew_len_sec asc
