表中主键必须为标识列，[ID] int IDENTITY (1,1)
1.分页方案一：(利用Not In和SELECT TOP分页)
语句形式：
SELECT TOP 页记录数量 *
FROM 表名
WHERE (ID NOT IN
(SELECT TOP (每页行数*(页数-1)) ID
FROM 表名
ORDER BY ID))
ORDER BY ID
//自己还可以加上一些查询条件
例:
select top 2 *
from Sys_Material_Type
where (MT_ID not in
(select top (2*(3-1)) MT_ID from Sys_Material_Type order by MT_ID))
order by MT_ID
又例：
SELECT TOP 20 *
FROM capm
WHERE (stkid NOT IN
(SELECT TOP (100*2) stkid
FROM capm
ORDER BY stkid))
ORDER BY stkid
2.分页方案二：(利用ID大于多少和SELECT TOP分页）
语句形式：
SELECT TOP 每页记录数量 *
FROM 表名
WHERE (ID >
(SELECT MAX(id)
FROM (SELECT TOP 每页行数*页数 id FROM 表
ORDER BY id) AS T)
)
ORDER BY ID
例:
SELECT TOP 2 *
FROM Sys_Material_Type
WHERE (MT_ID >
(SELECT MAX(MT_ID)
FROM (SELECT TOP (2*(3-1)) MT_ID
FROM Sys_Material_Type
ORDER BY MT_ID) AS T))
ORDER BY MT_ID
3.分页方案三：(利用SQL的游标存储过程分页)
create procedure SqlPager
@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
4.总结:
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
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另一个角度：
1、使用SQL Server 2005中新增的ROW_NUMBER
几种写法分别如下：
1 SELECT TOP 20 * FROM (SELECT ROW_NUMBER() OVER (ORDER BY Namec)
2 AS RowNumber, * FROM dbo.mem_member) T WHERE RowNumber > 10000
例子：
SELECT TOP 100 * FROM (SELECT ROW_NUMBER() OVER (ORDER BY stkid) AS RowNumber,* FROM capm) A
WHERE RowNumber > 0
1 SELECT * FROM (SELECT
2 ROW_NUMBER() OVER (ORDER BY Namec) AS RowNumber,
3 * FROM dbo.mem_member) _myResults
4 WHERE
5 RowNumber between 10000 and 10020
1 WITH OrderedResults AS
2 (SELECT *, ROW_NUMBER() OVER (order by Namec) as RowNumber FROM dbo.mem_member)
3 SELECT * FROM OrderedResults
4 WHERE RowNumber between 10000 and 10020
不管哪种写法，性能都不理想。在8,9万条数据的情况下要运行6秒左右
2、使用临时表再加存储过程
1 BEGIN
2 DECLARE @PageLowerBound int
3 DECLARE @PageUpperBound int
4
5 -- Set the page bounds
6 SET @PageLowerBound = 10000
7 SET @PageUpperBound = 10020
8
9 -- Create a temp table to store the select results
10 Create Table #PageIndex
11 (
12 [IndexId] int IDENTITY (1, 1) NOT NULL,
13 [Id] varchar(18)
14 )
15
16 -- Insert into the temp table
17 declare @SQL as nvarchar(4000)
18 SET @SQL = 'INSERT INTO #PageIndex (Id)'
19 SET @SQL = @SQL + ' SELECT'
20 SET @SQL = @SQL + ' TOP ' + convert(nvarchar, @PageUpperBound)
21 SET @SQL = @SQL + ' m_id'
22 SET @SQL = @SQL + ' FROM dbo.mem_member'
23 SET @SQL = @SQL + ' ORDER BY NameC'
24
25 -- Populate the temp table
26 exec sp_executesql @SQL
27
28 -- Return paged results
29 SELECT O.*
30 FROM
31 dbo.mem_member O,
32 #PageIndex PageIndex
33 WHERE
34 PageIndex.IndexID > @PageLowerBound
35 AND O.[m_Id] = PageIndex.[Id]
36 ORDER BY
37 PageIndex.IndexID
38
39 drop table #PageIndex
40 END
而使用这种方法，在同样的情况下用时只需1秒。
看样子，row_number是个鸡肋。
3、如果觉得临时表不好，还可以使用SET ROWCOUNT
1 begin
2 DECLARE @first_id varchar(18), @startRow int
3
4 SET ROWCOUNT 10000
5 SELECT @first_id = m_id FROM mem_member ORDER BY m_id
6
7 SET ROWCOUNT 20
8
9 SELECT m.*
10 FROM mem_member m
11 WHERE m_id >= @first_id
12 ORDER BY m.m_id
13
14 SET ROWCOUNT 0
15 end
不过，这种方法有缺点。按ID排序就快，按其他字段排序就慢
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