select businesstype,count as total from mv_dp_gjdxxsl order by 
(case when businesstype='小学' then 1 
  when businesstype='初级中学' then 2
  when businesstype='九年一贯制学校' then 3
  when businesstype='高级中学' then 4
  when businesstype='完全中学' then 5
  when businesstype='十二年一贯制学校' then 6
 end)