select * from user a where a.is_del=0 and a.id in
select * from user a where a.is_del=0 and a.id in(1,2,3)order by field(a.id,3,2,1)
select * from user a where a.is_del=0 and a.id in
select * from user a where a.is_del=0 and a.id in(1,2,3)order by field(a.id,3,2,1)