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_format(out_time,'%Y-%m-%d') dt, round(sum(timestampdiff(second,in_time,out_time))/count(distinct uid),1) avg_viiew_len_sec from tb_user_log where date_format(out_time,'%Y-%m') = '2021-11' and artical_id != 0 group by date_format(out_time,'%Y-%m-%d') order by avg_viiew_len_sec
