SQL Server 2005下的分页SQL (转载)
SQL Server 2005下的分页SQL
其实基本上有三种方法：
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
2 ROW_NUMBER() OVER (ORDER BY Namec) AS RowNumber,
3 *
4FROM
5 dbo.mem_member) _myResults
6WHERE
7 RowNumber > 10000
8
SELECT TOP 20 * FROM (SELECT2
ROW_NUMBER() OVER (ORDER BY Namec) AS RowNumber,3
*4
FROM5
dbo.mem_member) _myResults6
WHERE7
RowNumber > 100008
1SELECT * FROM (SELECT
2 ROW_NUMBER() OVER (ORDER BY Namec) AS RowNumber,
3 *
4FROM
5 dbo.mem_member) _myResults
6WHERE
7 RowNumber between 10000 and 10020
SELECT * FROM (SELECT2
ROW_NUMBER() OVER (ORDER BY Namec) AS RowNumber,3
*4
FROM5
dbo.mem_member) _myResults6
WHERE7
RowNumber between 10000 and 10020
1WITH OrderedResults AS
2
3(SELECT *, ROW_NUMBER() OVER (order by Namec) as RowNumber FROM dbo.mem_member)
4
5SELECT *
6
7FROM OrderedResults
8
9WHERE RowNumber between 10000 and 10020
WITH OrderedResults AS 2
3
(SELECT *, ROW_NUMBER() OVER (order by Namec) as RowNumber FROM dbo.mem_member)4
5
SELECT * 6
7
FROM OrderedResults8
9
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
1BEGIN
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
39drop table #PageIndex
40 END
BEGIN2
DECLARE @PageLowerBound int3
DECLARE @PageUpperBound int4
5
-- Set the page bounds6
SET @PageLowerBound = 100007
SET @PageUpperBound = 100208
9
-- Create a temp table to store the select results10
Create Table #PageIndex11
(12
[IndexId] int IDENTITY (1, 1) NOT NULL,13
[Id] varchar(18) 14
)15
16
-- Insert into the temp table17
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 table26
exec sp_executesql @SQL27
28
-- Return paged results29
SELECT O.*30
FROM31
dbo.mem_member O,32
#PageIndex PageIndex33
WHERE34
PageIndex.IndexID > @PageLowerBound35
AND O.[m_Id] = PageIndex.[Id]36
ORDER BY37
PageIndex.IndexID38
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
1begin
2DECLARE @first_id varchar(18), @startRow int
3
4SET ROWCOUNT 10000
5SELECT @first_id = m_id FROM mem_member ORDER BY m_id
6
7SET ROWCOUNT 20
8
9SELECT m.*
10FROM mem_member m
11WHERE m_id >= @first_id
12ORDER BY m.m_id
13
14SET ROWCOUNT 0
15end
begin2
DECLARE @first_id varchar(18), @startRow int3
4
SET ROWCOUNT 100005
SELECT @first_id = m_id FROM mem_member ORDER BY m_id6
7
SET ROWCOUNT 208
9
SELECT m.* 10
FROM mem_member m11
WHERE m_id >= @first_id12
ORDER BY m.m_id13
14
SET ROWCOUNT 015
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。
大家有什么意见，欢迎拍砖。
参考文章：
http://www.4guysfromrolla.com/webtech/042606-1.shtml
http://www.4guysfromrolla.com/webtech/041206-1.shtml
http://www.singingeels.com/Articles/Pagination_In_SQL_Server_2005.aspx
