题解 | #平均播放进度大于60%的视频类别#
https://www.nowcoder.com/practice/c60242566ad94bc29959de0cdc6d95ef
select tag, concat(round(avg(if(TIMESTAMPDIFF(second,start_time,end_time)>=duration,1,TIMESTAMPDIFF(second,start_time,end_time)/duration))*100,2) ,'%') as avg_play_progress from tb_user_video_log join tb_video_info t1 using(video_id) group by tag having avg_play_progress >60 order by avg_play_progress desc
datetime不同年月天时直接相减会有误
