题解 | #各个视频的平均完播率#
各个视频的平均完播率
https://www.nowcoder.com/practice/96263162f69a48df9d84a93c71045753
select a.video_id, round(sum(case when timestampdiff(second, a.start_time, a.end_time) >= b.duration then 1 else 0 end) / count(a.uid), 3) as avg_comp_play_rate from tb_user_video_log a join tb_video_info b on a.video_id = b.video_id where start_time >= '2021-01-01' and start_time < '2022-01-01' group by a.video_id order by avg_comp_play_rate desc
