1. 关键字rownum
-- 案例: 查询第3页,每页 10 条数据
select id,lastname from
(
select id,lastname,rownum rn
from (select id,lastname from hrm order by id asc)
where rownum <= 30
) a
where a.rn > 20
-- 解读: pageNumber:页码;例如第一页; pageSize :每页条数;例如每页显示10条
select id,lastname from
(
select id,lastname,rownum rn
from (select id,lastname from hrm order by id asc)
where rownum <= pageSize*pageNumber
) a
where a.rn > (pageSize-1)*pageNumber