题解 | #每类视频近一个月的转发量/率#
每类视频近一个月的转发量/率
https://www.nowcoder.com/practice/a78cf92c11e0421abf93762d25c3bfad
select tag , sum((if(if_retweet='1',1,0))) retweet_cut , round(sum((if(if_retweet='1',1,0)))/count(start_time),3) retweet_rate from tb_user_video_log a left join tb_video_info b using (video_id) where timestampdiff(day,start_time,(SELECT MAX(start_time) FROM tb_user_video_log)) < 30 group by tag order by retweet_rate desc
查看12道真题和解析