select *
from (select rownum r,e1.*
from (select * from emp order by sal) e1
where rownum <=5
)
from (select rownum r,e1.*
from (select * from emp order by sal) e1
where rownum <=5
)
where r >0;
比如分页显示字段数为5
第一个rownum 公式(当前页)*分页显示字段数
第二个rownum公式(当前页-1)*分页显示字段数