shenlele088的专栏

1、常规做法——大众写法——速度有衰减，且速度慢select * from (select t.*, rownum rn from (select * from person order by person_Id) t where rownum < 5000000) where rn >

select * from (select t.*, rownum rn from (select * from person order by person_Id) t where rownum < 5000000) where rn > 4999990 ；selec