毫秒级百万数据分页存储历程[MSSQL防范]

本日把我利用的分页代码持续分享,首先参考园子里的高手办法生成一个百万数据表; 耗时 33 秒;

然后成立分页存储历程;这个是基于SQL 2005 的ROW_NUMBER的, SQL 2000 不实用; SQL 2008 我没有安装,所以也没有测试过!预计应当可以运行.

 2种算法可以挑选 1. 利用  BETWEEN   ;  2.  TOP  ; 代码中已经注释了.

我测试了一下2种办法基本没有什么辨别;代码以下:

USE [DATA_TEMP]
GO
/****** 对象:  StoredProcedure [dbo].[im531_Page]    脚本日期: 11/26/2010 10:52:35 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

-- =============================================
-- Author:  im531
-- Create date: 2010-10-25
-- Description: SQL 2005 ROW_NUMBER 分页
-- Modify Date: 2010-10-26
-- =============================================

CREATE PROCEDURE [dbo].[im531_Page]
 @TabeName AS NVARCHAR(50),
 @Fields AS NVARCHAR(1024),
 @SearchWhere AS NVARCHAR(1024),
 @OrderFields AS NVARCHAR(1024),
 @pageNumber AS INT,
 @page AS INT
AS
BEGIN
 SET NOCOUNT ON;
 DECLARE @sqlType AS TINYINT
 SET @sqlType = 0  -- 0 BETWEEN  1 TOP
 DECLARE @sql AS NVARCHAR(MAX)
 IF @SearchWhere <> '' SET @SearchWhere = ' WHERE ' + @SearchWhere
 IF @page < 2 SET @page = 1
 IF @page = 1
  BEGIN
   SET @sql = 'SELECT TOP ' + CONVERT(NVARCHAR(20),@pageNumber) + ' ' + @Fields
    + 'FROM [' + @TabeName + '][a] WITH(NOLOCK) ' + @SearchWhere + ' ORDER BY ' + @OrderFields
  END
 ELSE
  BEGIN
   --暂时表
   SET @sql = ';WITH [Page_____Table] AS('
    + 'SELECT ROW_NUMBER() OVER(ORDER BY ' + @OrderFields + ') AS [RowNow],' + @Fields
    + 'FROM ['+ @TabeName +' ][a] WITH(NOLOCK) ' + @SearchWhere
    + ')'
   --查找当前页面记录
   IF @sqlType = 0
    BEGIN
    -- A USE BETWEEN
     SET @sql = @sql + 'SELECT *'
      + 'FROM [Page_____Table] WITH(NOLOCK)'
      + 'WHERE [RowNow] BETWEEN ' + CONVERT(NVARCHAR(20),(@page - 1) * @pageNumber + 1) + ' AND ' + CONVERT(NVARCHAR(20),@page * @pageNumber)
      + 'ORDER BY [RowNow]'
    END
   ELSE
    BEGIN
    -- B USE TOP
     SET @sql = @sql + 'SELECT TOP ' + CONVERT(NVARCHAR(20),@pageNumber) + ' *'
      + 'FROM [Page_____Table] WITH(NOLOCK)'
      + 'WHERE [RowNow] > ' + CONVERT(NVARCHAR(20),(@page - 1) * @pageNumber)
      + 'ORDER BY [RowNow]'
    END
  END
 EXEC(@sql)
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,当前页采取随机数取值;

DECLARE @d DATETIME
SET @d = GETDATE()

DECLARE @M AS INT;DECLARE @N AS INT;DECLARE @cPage AS INT
SET @M = 50000;SET @N = 1
SET @cPage = CAST((rand()*(@M-@N)+@N) AS INT)

EXECUTE [im531_Page]
 @TabeName = 'Table_1',
 @Fields = '[a],[b]',
 @SearchWhere = '[a] > 0',
 @OrderFields = '[a] DESC',
 @pageNumber = 20,
 @page = @cPage

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

在我的机械上面测试均为毫秒级!!!!

园子里的高手若有更好的办法欢送分享一下!!!!!!!!!!!!!!! 　　以上是“毫秒级百万数据分页存储历程[MSSQL防范]”的内容，如果你对以上该文章内容感兴趣，你可以看看七道奇为您推荐以下文章：