普通情况对于有主键,能够做唯一表识的表。我们能够利用主键和rownum配合实现。比如:
select scott.emp.*
from scott.emp left join
(select empno id, rownum num from scott.emp) id_num
on scott.emp.empno = id_num.id
where id_num.num between 5 and 10;
假设遇到没有主键的表能够尝试rowid取代。rowid不会由于排序或者查询,甚至update都不会改动,因此能够借助这个字段作分页。
select scott.emp.*
from scott.emp left join
(select rowid id, rownum num from scott.emp) id_num
on scott.emp.rowid = id_num.id
where id_num.num between 5 and 10;