select author,month,fans_growth_rate,sum(fans)over(partition by author order by month) total_fans from( select author,left(start_time,7) as month,round((sum(if(if_follow = 1,1,0))-sum(if(if_follow = 2,1,0)))/count(1),3) fans_growth_rate,sum(if(if_follow = 1,1,0))-sum(if(if_follow = 2,1,0)) as fans f...