数据分页一直是一个经久不衰的话题,在园子里看到了N多高手,都比我厉害,

今天把我使用的分页代码继续分享;请高手手下留情,少拍砖啦...哈哈;

欢迎大家转载!!!!

首先参考园子里的高手方法生成一个百万数据表; 耗时 33 秒;

然后创建分页存储过程;这个是基于SQL 2005 的ROW_NUMBER的, SQL 2000 不适用; SQL 2008 我没有安装,所以也没有测试过!估计应该可以运行.

2种算法可以选择 1. 使用 BETWEEN ; 2. TOP ; 代码中已经注释了.

我测试了一下2种方法基本没有什么区别;代码如下:

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USE [DATA_TEMP] 

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GO 

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/****** 对象:  StoredProcedure [dbo].[im531_Page]    脚本日期: 11/26/2010 10:52:35 ******/ 

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SET ANSI_NULLS ON

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GO 

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SET QUOTED_IDENTIFIER ON

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GO 

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-- ============================================= 

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-- Author:      im531  

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-- Create date: 2010-10-25 

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-- Description: SQL 2005 ROW_NUMBER 分页 

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-- Modify Date: 2010-10-26 

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-- ============================================= 

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CREATE PROCEDURE [dbo].[im531_Page] 

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    @TabeName AS NVARCHAR(50), 

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    @Fields AS NVARCHAR(1024), 

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    @SearchWhere AS NVARCHAR(1024), 

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    @OrderFields AS NVARCHAR(1024), 

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    @pageNumber AS INT, 

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    @page AS INT

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AS

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BEGIN

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    SET NOCOUNT ON; 

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    DECLARE @sqlType AS TINYINT 

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    SET @sqlType = 0  -- 0 BETWEEN   1 TOP 

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    DECLARE @sql AS NVARCHAR(MAX) 

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    IF @SearchWhere <> '' SET @SearchWhere = ' WHERE ' + @SearchWhere 

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    IF @page < 2 SET @page = 1 

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    IF @page = 1 

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        BEGIN

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            SET @sql = 'SELECT TOP ' + CONVERT(NVARCHAR(20),@pageNumber) + ' ' + @Fields 

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                + 'FROM [' + @TabeName + '][a] WITH(NOLOCK) ' + @SearchWhere + ' ORDER BY ' + @OrderFields 

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        END

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    ELSE

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        BEGIN

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            --临时表 

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            SET @sql = ';WITH [Page_____Table] AS('

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                + 'SELECT ROW_NUMBER() OVER(ORDER BY ' + @OrderFields + ') AS [RowNow],' + @Fields 

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                + 'FROM ['+ @TabeName +' ][a] WITH(NOLOCK) ' + @SearchWhere 

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                + ')'

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            --查找当前页面记录 

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            IF @sqlType = 0 

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                BEGIN

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                -- A USE BETWEEN 

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                    SET @sql = @sql + 'SELECT *'

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                        + 'FROM [Page_____Table] WITH(NOLOCK)'

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                        + 'WHERE [RowNow] BETWEEN ' + CONVERT(NVARCHAR(20),(@page - 1) * @pageNumber + 1) + ' AND ' + CONVERT(NVARCHAR(20),@page * @pageNumber) 

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                        + 'ORDER BY [RowNow]'

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                END

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            ELSE

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                BEGIN

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                -- B USE TOP 

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                    SET @sql = @sql + 'SELECT TOP ' + CONVERT(NVARCHAR(20),@pageNumber) + ' *'

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                        + 'FROM [Page_____Table] WITH(NOLOCK)'

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                        + 'WHERE [RowNow] > ' + CONVERT(NVARCHAR(20),(@page - 1) * @pageNumber) 

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                        + 'ORDER BY [RowNow]'

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                END

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        END

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    EXEC(@sql) 

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END

然后测试分页性能;每页显示20条记录, 百万数据最大50000页,当前页采用随机数取值;

 
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DECLARE @d DATETIME 

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SET @d = GETDATE() 

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DECLARE @M AS INT;DECLARE @N AS INT;DECLARE @cPage AS INT

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SET @M = 50000;SET @N = 1 

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SET @cPage = CAST((rand()*(@M-@N)+@N) AS INT) 

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EXECUTE [im531_Page] 

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    @TabeName = 'Table_1', 

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    @Fields = '[a],[b]', 

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    @SearchWhere = '[a] > 0', 

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    @OrderFields = '[a] DESC', 

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    @pageNumber = 20, 

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    @page = @cPage 

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SELECT [当前页] = @cPage,[分页执行耗时间(毫秒)] = DATEDIFF(ms,@d,GETDATE())

在我的机器上面测试均为毫秒级!!!!

园子里的高手若有更好的方法欢迎分享一下!!!!!!!!!!!!!!!

--------------------------------------- 我是华丽的分割线 ---------------------------------------

回复10楼园友 ★金★ :

加上数据统计结果后稍慢了一丁点儿,估计在实际运用中可以忽略不计;

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毫秒级百万数据分页存储过程

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