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_retweet)retweet_cut ,round(sum(if_retweet)/count(video_id),3)retweet_rate from tb_user_video_log join tb_video_info using(video_id) where date(start_time)>(select date_sub(max(date(start_time)),interval 30 day)from tb_user_video_log) group by tag order by retweet_rate desc;

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