sql 语句实现分页查询

SELECT * FROM
(
SELECT A.*, ROWNUM RN
FROM (SELECT * FROM TABLE_NAME) A
WHERE ROWNUM <= 40
)
WHERE RN >= 21

查询记录 21至40的数据记录

页数page pagesize

开始记录值 RN>=(page-1)*pagesize+1

结束记录索引值ROWNUM<=page*pagesize