一、DB2:
DB2分页查询
SELECT * FROM (Select 字段1,字段2,字段3,rownumber() over(ORDER BY 排序用的列名 ASC) AS rn from 表名) AS a1 WHERE a1.rn BETWEEN 10 AND 20
以上表示提取第10到20的纪录
select * from (select rownumber() over(order by id asc ) as rowid from table where rowid <=endIndex ) where rowid > startIndex
如果Order By 的字段有重复的值，那一定要把此字段放到 over()中
select * from ( select ROW_NUMBER() OVER(ORDER BY DOC_UUID DESC) AS ROWNUM, DOC_UUID, DOC_DISPATCHORG, DOC_SIGNER, DOC_TITLE from DT_DOCUMENT ) a where
ROWNUM > 20 and ROWNUM <=30
增加行号，不排序
select * from ( select ROW_NUMBER() OVER() AS ROWNUM,t.* from DT_DOCUMENT t ) a
增加行号，按某列排序
select * from ( select ROW_NUMBER() OVER( ORDER BY DOC_UUID DESC ) AS ROWNUM,t.* from DT_DOCUMENT t ) a
二、Mysql:
最简单
select * from table limit start,pageNum
比如从10取20个数据
select * from table limit 10,20
三、Oracle：
select * from (select rownum,name from table where rownum <=endIndex ) where rownum > startIndex
例如从表Sys_option(主键为sys_id)中从10条记录还是检索20条记录，语句如下：
SELECT *
FROM (SELECT ROWNUM R,t1.* From Sys_option where rownum < 30 ) t2
Where t2.R >= 10
四、 sql server:
分页方案一：(利用Not In和SELECT TOP分页)
语句形式：
SELECT TOP 10 *
FROM TestTable
WHERE (ID NOT IN
(SELECT TOP 20 id
FROM TestTable
ORDER BY id))
ORDER BY ID
SELECT TOP 页大小 *
FROM TestTable
WHERE (ID NOT IN
(SELECT TOP 页大小*页数 id
FROM 表
ORDER BY id))
ORDER BY ID
-------------------------------------
分页方案二：(利用ID大于多少和SELECT TOP分页）
语句形式：
SELECT TOP 10 *
FROM TestTable
WHERE (ID >
(SELECT MAX(id)
FROM (SELECT TOP 20 id
FROM TestTable
ORDER BY id) AS T))
ORDER BY ID
SELECT TOP 页大小 *
FROM TestTable
WHERE (ID >
(SELECT MAX(id)
FROM (SELECT TOP 页大小*页数 id
FROM 表
ORDER BY id) AS T))
ORDER BY ID
-------------------------------------
分页方案三：(利用SQL的游标存储过程分页)
create procedure XiaoZhengGe
@sqlstr nvarchar(4000), --查询字符串
@currentpage int, --第N页
@pagesize int --每页行数
as
set nocount on
declare @P1 int, --P1是游标的id
@rowcount int
exec sp_cursoropen @P1 output,@sqlstr,@scrollopt=1,@ccopt=1,@[email protected] output
select ceiling(1.0*@rowcount/@pagesize) as 总页数--,@rowcount as 总行数,@currentpage as 当前页
set @currentpage=(@currentpage-1)*@pagesize+1
exec sp_cursorfetch @P1,16,@currentpage,@pagesize
exec sp_cursorclose @P1
set nocount off
其它的方案：如果没有主键，可以用临时表，也可以用方案三做，但是效率会低。
建议优化的时候，加上主键和索引，查询效率会提高。
通过SQL 查询分析器，显示比较：我的结论是:
分页方案二：(利用ID大于多少和SELECT TOP分页）效率最高，需要拼接SQL语句
分页方案一：(利用Not In和SELECT TOP分页) 效率次之，需要拼接SQL语句
分页方案三：(利用SQL的游标存储过程分页) 效率最差，但是最为通用