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, FORMAT(SUM(IF((UNIX_TIMESTAMP(end_time)-UNIX_TIMESTAMP(start_time))>=duration,1,0))/COUNT(a.video_id),3) AS avg_comp_play_rate FROM tb_user_video_log AS a,tb_video_info AS b WHERE a.video_id=b.video_id AND YEAR(start_time)=2021 GROUP BY a.video_id ORDER BY avg_comp_play_rate DESC;
