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 tu.video_id, round(sum(case when timestampdiff(second,start_time,end_time)>= tv.duration then 1 else 0 end)/count(tu.video_id),3) as avg_comp_play_rate from tb_user_video_log tu left join tb_video_info tv on tu.video_id = tv.video_id where year(start_time) = 2021 group by tu.video_id order by avg_comp_play_rate desc
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