真正高效的SQLSERVER分页查询

第一种方案、最简单、普通的方法：

SELECT TOP 30 * FROM ARTICLE WHERE ID NOT IN(SELECT TOP 45000 ID FROM ARTICLE ORDER BY YEAR DESC, ID DESC) ORDER BY YEAR DESC,ID DESC  

     平均查询100次所需时间：45s

第二种方案：

SELECT * FROM (　　SELECT TOP 30 * FROM (SELECT TOP 45030 * FROM ARTICLE ORDER BY YEAR DESC, ID DESC) f ORDER BY f.YEAR ASC, f.ID DESC) s ORDER BY s.YEAR DESC,s.ID DESC  

     平均查询100次所需时间：138S

第三种方案：

SELECT * FROM ARTICLE w1, (    SELECT TOP 30 ID FROM     (        SELECT TOP 50030 ID, YEAR FROM ARTICLE ORDER BY YEAR DESC, ID DESC    ) w ORDER BY w.YEAR ASC, w.ID ASC) w2 WHERE w1.ID = w2.ID ORDER BY w1.YEAR DESC, w1.ID DESC  

     平均查询100次所需时间：21S

第四种方案：

SELECT * FROM ARTICLE w1     WHERE ID in         (            SELECT top 30 ID FROM             (                SELECT top 45030 ID, YEAR FROM ARTICLE ORDER BY YEAR DESC, ID DESC            ) w ORDER BY w.YEAR ASC, w.ID ASC        )     ORDER BY w1.YEAR DESC, w1.ID DESC  

     平均查询100次所需时间：20S

第五种方案：

SELECT w2.n, w1.* FROM ARTICLE w1, (　　SELECT TOP 50030 row_number() OVER (ORDER BY YEAR DESC, ID DESC) n, ID FROM ARTICLE ) w2 WHERE w1.ID = w2.ID AND w2.n > 50000 ORDER BY w2.n ASC  

     平均查询100次所需时间：15S

 

 

查询第1000-1030条记录

第一种方案：

SELECT TOP 30 * FROM ARTICLE WHERE ID NOT IN(SELECT TOP 1000 ID FROM ARTICLE ORDER BY YEAR DESC, ID DESC) ORDER BY YEAR DESC,ID DESC  

     平均查询100次所需时间：80s

第二种方案：

SELECT * FROM  ( 　　SELECT TOP 30 * FROM (SELECT TOP 1030 * FROM ARTICLE ORDER BY YEAR DESC, ID DESC) f ORDER BY f.YEAR ASC, f.ID DESC) s ORDER BY s.YEAR DESC,s.ID DESC  

     平均查询100次所需时间：30S

第三种方案：

SELECT * FROM ARTICLE w1, (    SELECT TOP 30 ID FROM     (        SELECT TOP 1030 ID, YEAR FROM ARTICLE ORDER BY YEAR DESC, ID DESC    ) w ORDER BY w.YEAR ASC, w.ID ASC) w2 WHERE w1.ID = w2.ID ORDER BY w1.YEAR DESC, w1.ID DESC  

     平均查询100次所需时间：12S

第四种方案：

SELECT * FROM ARTICLE w1     WHERE ID in         (            SELECT top 30 ID FROM             (                SELECT top 1030 ID, YEAR FROM ARTICLE ORDER BY YEAR DESC, ID DESC            ) w ORDER BY w.YEAR ASC, w.ID ASC        )     ORDER BY w1.YEAR DESC, w1.ID DESC  

     平均查询100次所需时间：13S

第五种方案：

SELECT w2.n, w1.* FROM ARTICLE w1,( 　　SELECT TOP 1030 row_number() OVER (ORDER BY YEAR DESC, ID DESC) n, ID FROM ARTICLE) w2 WHERE w1.ID = w2.ID AND w2.n > 1000 ORDER BY w2.n ASC  

     平均查询100次所需时间：14S

 

 

     由此可见在查询页数靠前时，效率3>4>5>2>1，页码靠后时5>4>3>1>2，再根据用户习惯，一般用户的检索只看最前面几页，因此选择3 4 5方案均可，若综合考虑方案5是最好的选择，但是要注意SQL2000不支持row_number()函数，由于时间和条件的限制没有做更深入、范围更广的测试，有兴趣的可以仔细研究下。

 

 

以下是根据第四种方案编写的一个分页存储过程：

if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[sys_Page_v2]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)drop procedure [dbo].[sys_Page_v2]GOCREATE PROCEDURE [dbo].[sys_Page_v2]@PCount int output,    --总页数输出@RCount int output,    --总记录数输出@sys_Table nvarchar(100),    --查询表名@sys_Key varchar(50),        --主键@sys_Fields nvarchar(500),    --查询字段@sys_Where nvarchar(3000),    --查询条件@sys_Order nvarchar(100),    --排序字段@sys_Begin int,        --开始位置@sys_PageIndex int,        --当前页数@sys_PageSize int        --页大小ASSET NOCOUNT ONSET ANSI_WARNINGS ONIF @sys_PageSize < 0 OR @sys_PageIndex < 0BEGIN        RETURNENDDECLARE @new_where1 NVARCHAR(3000)DECLARE @new_order1 NVARCHAR(100)DECLARE @new_order2 NVARCHAR(100)DECLARE @Sql NVARCHAR(4000)DECLARE @SqlCount NVARCHAR(4000)DECLARE @Top intif(@sys_Begin <=0)    set @sys_Begin=0else    set @sys_Begin=@sys_Begin-1IF ISNULL(@sys_Where,'') = ''    SET @new_where1 = ' 'ELSE    SET @new_where1 = ' WHERE ' + @sys_Where IF ISNULL(@sys_Order,'') <> '' BEGIN    SET @new_order1 = ' ORDER BY ' + Replace(@sys_Order,'desc','')    SET @new_order1 = Replace(@new_order1,'asc','desc')    SET @new_order2 = ' ORDER BY ' + @sys_OrderENDELSEBEGIN    SET @new_order1 = ' ORDER BY ID DESC'    SET @new_order2 = ' ORDER BY ID ASC'ENDSET @SqlCount = 'SELECT @RCount=COUNT(1),@PCount=CEILING((COUNT(1)+0.0)/'            + CAST(@sys_PageSize AS NVARCHAR)+') FROM ' + @sys_Table + @new_where1EXEC SP_EXECUTESQL @SqlCount,N'@RCount INT OUTPUT,@PCount INT OUTPUT',               @RCount OUTPUT,@PCount OUTPUTIF @sys_PageIndex > CEILING((@RCount+0.0)/@sys_PageSize)    --如果输入的当前页数大于实际总页数,则把实际总页数赋值给当前页数BEGIN    SET @sys_PageIndex =  CEILING((@RCount+0.0)/@sys_PageSize)ENDset @sql = 'select '+ @sys_fields +' from ' + @sys_Table + ' w1 '    + ' where '+ @sys_Key +' in ('        +'select top '+ ltrim(str(@sys_PageSize)) +' ' + @sys_Key + ' from '        +'('            +'select top ' + ltrim(STR(@sys_PageSize * @sys_PageIndex + @sys_Begin)) + ' ' + @sys_Key + ' FROM '         + @sys_Table + @new_where1 + @new_order2         +') w ' + @new_order1    +') ' + @new_order2print(@sql)Exec(@sql)GO