随着数据库的发展，如今的数据库可以储存大量的数据，内存也是越来越大，但是无论您的内存多大，内存总是显得不够用，这时就要涉及到分页，下文中将为大家带来详细的数据库分页操作。
1.Oracle:
|
1
2
|
select * from ( select row_.*, rownum rownum_ from ( query_SQL ) row_
where rownum =< max) where rownum_ >= min
|
2.SQL Server:
|
1
2
|
select top @pagesize * from tablename where id not in
(select top @pagesize*(@page-1) id from tablename order by id) order by id
|
3.MySQL
|
1
|
select * from tablename limit position, counter
|
4.DB2
|
1
2
|
select * from (select *,rownumber() as ROW_NEXT from tablename)
where ROW_NEXT between min and max
|
语句形式：
|
1
2
3
4
5
6
|
SELECT TOP 10 * FROM TestTable
WHERE(ID NOT IN (SELECT TOP 20 id FROM TestTable ORDERBY id)) ORDERBYID
SELECT TOP 页大小 * FROM TestTable
WHERE( ID NOT IN (SELECT TOP 每页大小-1*待查询页数-1 id FROM 表
ORDERBY id)) ORDERBYID |
思路：先查询出待查询页之前的全部条数的id，查询ID不在这些ID中的指定数量条数。
语句形式：
|
1
2
3
4
5
6
|
SELECT TOP 10 * FROM TestTable
WHERE(ID>(SELECT MAX(id) FROM(SELECT TOP20 id FROM TestTable ORDERBYid)
AS T))ORDERBY ID
SELECT TOP 页大小* FROM TestTable
WHERE(ID>(SELECT MAX(id) FROM(SELECT TOP 每页大小*待查询页数-1 id FROM 表
ORDERBY id)AS T)) ORDERBY ID
|
思路：先获得待查询页的之前全部条数id，获得它们当中最大的ID号，以此最大ID号为标志，查找比这个ID号大的指定条数。
|
1
2
3
4
|
SELECT TOP PageSize * FROM
(SELECT TOP nPage*PageSize * from YOURTABLE order by id) as a order by id desc
SELECT TOP 每页条数 * FROM
(SELECT TOP 待查询页*每页条数) * from YOURTABLE order by id)as a order by id desc
|
思路：先正排序查询出待查询页之前(包括当前页)的全部条数，然后将其倒排序，取指定条数。