SELECT author, date_format(start_time,'%Y-%m') month, round(sum(if(if_follow=2,-1,if_follow)) / count(*),3) as fans_growth_rate, sum(sum(if(if_follow=2,-1,if_follow))) over(partition by author order by date_format(start_time,'%Y-%m')) total_fans FROM tb_user_video_log log left...