select author, DATE_FORMAT(start_time, "%Y-%m") as 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") asc) as total_fans from tb_user_video_log a...