select t1.stage,sum(t1.zhaoshengno) as zhaoshengno,sum(t1.biyeno) as biyeno,sum(t1.zaixiaono) as zaixiaono  from mv_db_base_student as t1  GROUP BY t1.stage order by 
(case when t1.stage='小学' then 1 
  when t1.stage='初中' then 2
  when t1.stage='高中' then 3
 end)