题解 | sql156#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(if(end_time - start_time >= duration, 1,0)) / count(start_time),3) as avg_comp_play_rate from tb_user_video_log as a left join tb_video_info as b on a.video_id = b.video_id where year(start_time) = 2021 group by a.video_id order by avg_comp_play_rate DESC
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