经常在网站上看到“上一页/下一页”，实现方法主要是每次到数据库中得到当前页面的数据，下面总结Oracle, SQL Server 和MySQL的分页SQL语句如下：
Oracle：
方法一：
SELECT * FROM
(
SELECT A.*, ROWNUM RN
FROM (SELECT * FROM TABLE_NAME) A
WHERE ROWNUM <= 40
)
WHERE RN >= 21；
(
SELECT A.*, ROWNUM RN
FROM (SELECT * FROM TABLE_NAME) A
WHERE ROWNUM <= 40
)
WHERE RN >= 21；
方法二：
SELECT * FROM
(
SELECT A.*, ROWNUM RN
FROM (SELECT * FROM TABLE_NAME) A
)
WHERE RN between 21 and 40
(
SELECT A.*, ROWNUM RN
FROM (SELECT * FROM TABLE_NAME) A
)
WHERE RN between 21 and 40
公认第二种方法效率没有第一种高。原因是第二种要把子查询执行完，而第一种方法子查询执行到Rownum=40后就结束了。
MySQL:
SELECT * FROM TABLE_NAME LIMIT 10, 20
表示从第11条数据开始取20条数据返回，limit后的2个参数含义为：起点和步长，即从那条数据开始，取多少条数据，再如取前20条数据：SELECT * FROM TABLE_NAME LIMIT 0, 20
SQL Server2000：
SELECT TOP @pagesize * FROM TABLE_NAME WHERE id not in (SELECT TOP @pagesize*(@page-1) id FROM TABLE_NAME ORDER BY id) ORDER BY id
SQL Server 2005：
方法一：
SELECT ...
FROM
FROM
(
SELECT ROW_NUMBER() OVER (ORDER BY ID asc) AS RowNum, ......
FROM TABLE_NAME
) AS T
WHERE T.RowNum> 10 and T.RowNum<= 20
SELECT ROW_NUMBER() OVER (ORDER BY ID asc) AS RowNum, ......
FROM TABLE_NAME
) AS T
WHERE T.RowNum> 10 and T.RowNum<= 20
方法二：
WITH DataList AS
(
SELECT ROW_NUMBER() OVER (ORDER BY O.ID DESC)AS RowNum, ......
FROM .....
WHERE ......
(
SELECT ROW_NUMBER() OVER (ORDER BY O.ID DESC)AS RowNum, ......
FROM .....
WHERE ......
)
SELECT ......
FROM DataList
WHERE RowNum BETWEEN 10 AND 20
FROM DataList
WHERE RowNum BETWEEN 10 AND 20