select author,month,fans_growth_rate, sum(total_fans1) over (partition by author order by month) as total_fans from (select author, substr(start_time,1,7) as month, round((sum(if(if_follow=1,1,0))+sum(if(if_follow=2,-1,0)))/count(t1.id),3) as fans_growth_rate, sum(if(if_follow=1,1,0))+sum(if(if_foll...