SELECT 
@lastDay := last_day( date_add(@lastDay,interval 1 month ) ) lastDays
from 
(SELECT @lastDay := date_add(curdate(),interval -6 month) from application limit 6) a;



SELECT 
date_format(@lastDay := last_day( date_add(@lastDay,interval 1 month ) ) ,'%Y-%m'  ) lastDays
from 
(SELECT @lastDay := date_add(curdate(),interval -6 month) from application  limit 6) a;

输出：