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) as retweet_cut,
round(sum(if_retweet)/count(*),3) as retweet_rate
from
tb_user_video_log a
join tb_video_info b on a.video_id = b.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
这简历密密麻麻字太多了，要突出重点，精简