题解 | #国庆期间每类视频点赞量和转发量#

with t1 as(select tag,
DATE_FORMAT(start_time,'%Y-%m-%d') as dt,
sum(if_like) as like_cnt,
sum(if_retweet) as retweet_cnt
from tb_video_info join tb_user_video_log
using(video_id)
group by tag,dt
order by tag,dt),

t2 as(select tag,dt,
sum(like_cnt) over (PARTITION by tag order by dt rows 6 preceding)	sum_like_cnt_7d,
max(retweet_cnt) over (partition by tag order by dt rows 6 preceding) max_retweet_cnt_7d
from t1)

select * from t2
where dt between '2021-10-01' and '2021-10-03'
order by tag desc,dt