SELECT a.video_id , round(sum(if(timestampdiff(minute,a.start_time,a.end_time)>= b.duration, 1, 0))/count(start_time ),3) as avg_comp_play_rate FROM tb_user_video_log a LEFT JOIN tb_video_info b on a.video_id = b.video_id GROUP BY a.video_id having year(a.start_time)=2021 ORDER BY avg_comp_play_rate DESC; 能帮我分析一下哪里有问题吗
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