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(in_time, '%Y-%m-%d') AS dt,
round(sum(TIMESTAMPDIFF(SECOND, in_time, out_time))/count(distinct uid),1) AS avg_view_len_sec
FROM
tb_user_log
WHERE MONTH(in_time)=11 AND artical_id!=0
GROUP BY
dt
order by avg_view_len_sec asc;
