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 as a LEFT JOIN tb_video_info as b ON a.video_id = b.video_id WHERE YEAR(a.start_time) = '2021' GROUP BY a.video_id ORDER BY avg_comp_play_rate desc
