题解 | #各个视频的平均完播率#
各个视频的平均完播率
http://www.nowcoder.com/practice/96263162f69a48df9d84a93c71045753
用if函数来判断是否完成
select a.video_id,round(sum(if(timestampdiff(second,start_time,end_time)>=duration,1,0))/count(start_time),3) as rate from tb_user_video_log a left join tb_video_info b on a.video_id=b.video_id where year(start_time)='2021' group by a.video_id order by rate desc;
投递菜鸟集团等公司10个岗位