select author,month, round(sum(if_follw_new)/count(1),3) as fans_growth_rate, cumlate_fans as total_fans from (select author, substring_index(start_time,'-',2) as month, if(if_follow=1 or if_follow=0,if_follow,-1) as if_follw_new, sum(if(if_follow=1 or if_follow=...