大数据量分页存储过程效率测试附测试代码与结果

测试环境

硬件：CPU 酷睿双核T5750 内存：2G

软件:Windows server 2003 + sql server 2005

OK,我们首先创建一数据库：data_Test,并在此数据库中创建一表：tb_TestTable

复制代码代码如下:

create database data_Test --创建数据库

data_Test

use data_Test

create table tb_TestTable --创建表

(id int identity(1,1) primary key,

userName nvarchar(20) not null,

userPWD nvarchar(20) not null,

userEmail nvarchar(40) null)

然后我们在数据表中插入2000000条数据:

复制代码代码如下:

--插入数据

set identity_insert tb_TestTable on

declare @count int

set @count=1

while @count<=2000000

begin

insert into tb_TestTable(id,userName,userPWD,userEmail) values(@count,'admin','admin888','lli0077@yahoo.com.cn')

set @count=@count+1

end

set identity_insert tb_TestTable off

我首先写了五个常用存储过程：

1，利用select top 和select not in进行分页，具体代码如下：

复制代码代码如下:create procedure proc_paged_with_notin --利用select top and select not in

(

@pageIndex int, --页索引

@pageSize int --每页记录数

)

begin

set nocount on;

declare @timediff datetime --耗时

declare @sql nvarchar(500)

select @timediff=Getdate()

set @sql='select top '+str(@pageSize)+' * from tb_TestTable where(ID not in(select top '+str(@pageSize*@pageIndex)+' id from tb_TestTable order by ID ASC)) order by ID'

execute(@sql) --因select top后不支技直接接参数，所以写成了字符串@sql

select datediff(ms,@timediff,GetDate()) as 耗时

set nocount off;

end

2,利用select top 和 select max(列键)

复制代码代码如下:create procedure proc_paged_with_selectMax --利用select top and select max(列)

(

@pageIndex int, --页索引

@pageSize int --页记录数

)

begin

set nocount on;

declare @timediff datetime

declare @sql nvarchar(500)

select @timediff=Getdate()

set @sql='select top '+str(@pageSize)+' * From tb_TestTable where(ID>(select max(id) From (select top '+str(@pageSize*@pageIndex)+' id From tb_TestTable order by ID) as TempTable)) order by ID'

execute(@sql)

select datediff(ms,@timediff,GetDate()) as 耗时

set nocount off;

end

3,利用select top和中间变量--此方法因网上有人说效果最佳，所以贴出来一同测试

复制代码代码如下:create procedure proc_paged_with_Midvar --利用ID>最大ID值和中间变量

(

@pageIndex int,

@pageSize int

)

declare @count int

declare @ID int

declare @timediff datetime

declare @sql nvarchar(500)

begin

set nocount on;

select @count=0,@ID=0,@timediff=getdate()

select @count=@count+1,@ID=case when @count<=@pageSize*@pageIndex then ID else @ID end from tb_testTable order by id

set @sql='select top '+str(@pageSize)+' * from tb_testTable where ID>'+str(@ID)

execute(@sql)

select datediff(ms,@timediff,getdate()) as 耗时

set nocount off;

end

4,利用Row_number() 此方法为sql server 2005中新的方法,利用Row_number()给数据行加上索引

复制代码代码如下:create procedure proc_paged_with_Rownumber --利用SQL 2005中的Row_number()

(

@pageIndex int,

@pageSize int

)

declare @timediff datetime

begin

set nocount on;

select @timediff=getdate()

select * from (select *,Row_number() over(order by ID asc) as IDRank from tb_testTable) as IDWithRowNumber where IDRank>@pageSize*@pageIndex and IDRank<@pageSize*(@pageIndex+1)

select datediff(ms,@timediff,getdate()) as 耗时

set nocount off;

end

5，利用临时表及Row_number

复制代码代码如下:create procedure proc_CTE --利用临时表及Row_number

(

@pageIndex int, --页索引

@pageSize int --页记录数

)

set nocount on;

declare @ctestr nvarchar(400)

declare @strSql nvarchar(400)

declare @datediff datetime

begin

select @datediff=GetDate()

set @ctestr='with Table_CTE as

(select ceiling((Row_number() over(order by ID ASC))/'+str(@pageSize)+') as page_num,* from tb_TestTable)';

set @strSql=@ctestr+' select * From Table_CTE where page_num='+str(@pageIndex)

end

begin

execute sp_executesql @strSql

select datediff(ms,@datediff,GetDate())

set nocount off;

end

OK,至此，存储过程创建完毕，我们分别在每页10条数据的情况下在第2页，第1000页，第10000页，第100000页，第199999页进行测试，耗时单位：ms 每页测试5次取其平均值

存过第2页耗时第1000页耗时第10000页耗时第100000页耗时第199999页耗时效率排行

1用not in 0ms 16ms 47ms 475ms 953ms 3

2用select max 5ms 16ms 35ms 325ms 623ms 1

3中间变量 966ms 970ms 960ms 945ms 933ms 5

4row_number 0ms 0ms 34ms 365ms 710ms 2

4临时表 780ms 796ms 798ms 780ms 805ms 4

测试结果显示：select max >row_number>not in>临时表>中间变量

于是我对效率最高的select max方法用2分法进行了扩展，代码取自互联网，我修改了ASC排序时取不到值的BUG，测试结果:

2分法 156ms 156ms 180ms 470ms 156ms 1*

从测试结果来看，使用2分法确实可以提高效率并使效率更为稳定，我又增加了第159999页的测试，用时仅296ms，效果相当的不错！

下面是2分法使用select max的代码，已相当完善。

复制代码代码如下:

--/*-----存储过程分页处理孙伟 2005-03-28创建 -------*/

--/*-----存储过程分页处理浪尘 2008-9-1修改----------*/

--/*----- 对数据进行了2分处理使查询前半部分数据与查询后半部分数据性能相同 -------*/

alter PROCEDURE proc_paged_2part_selectMax

(

@tblName nvarchar(200), ----要显示的表或多个表的连接

@fldName nvarchar(500) = '*', ----要显示的字段列表

@pageSize int = 10, ----每页显示的记录个数

@page int = 1, ----要显示那一页的记录

@fldSort nvarchar(200) = null, ----排序字段列表或条件

@Sort bit = 0, ----排序方法，0为升序，1为降序(如果是多字段排列Sort指代最后一个排序字段的排列顺序(最后一个排序字段不加排序标记)--程序传参如：' SortA Asc,SortB Desc,SortC ')

@strCondition nvarchar(1000) = null, ----查询条件,不需where

@ID nvarchar(150), ----主表的主键

@Dist bit = 0, ----是否添加查询字段的 DISTINCT 默认0不添加/1添加

@pageCount int = 1 output, ----查询结果分页后的总页数

@Counts int = 1 output ----查询到的记录数

)

SET NOCOUNT ON

Declare @sqlTmp nvarchar(1000) ----存放动态生成的SQL语句

Declare @strTmp nvarchar(1000) ----存放取得查询结果总数的查询语句

Declare @strID nvarchar(1000) ----存放取得查询开头或结尾ID的查询语句

Declare @strSortType nvarchar(10) ----数据排序规则A

Declare @strFSortType nvarchar(10) ----数据排序规则B

Declare @SqlSelect nvarchar(50) ----对含有DISTINCT的查询进行SQL构造

Declare @SqlCounts nvarchar(50) ----对含有DISTINCT的总数查询进行SQL构造

declare @timediff datetime --耗时测试时间差

select @timediff=getdate()

if @Dist = 0

begin

set @SqlSelect = 'select '

set @SqlCounts = 'Count(*)'

end

else

begin

set @SqlSelect = 'select distinct '

set @SqlCounts = 'Count(DISTINCT '+@ID+')'

end

if @Sort=0

begin

set @strFSortType=' ASC '

set @strSortType=' DESC '

end

else

begin

set @strFSortType=' DESC '

set @strSortType=' ASC '

end

--------生成查询语句--------

--此处@strTmp为取得查询结果数量的语句

if @strCondition is null or @strCondition='' --没有设置显示条件

begin

set @sqlTmp = @fldName + ' From ' + @tblName

set @strTmp = @SqlSelect+' @Counts='+@SqlCounts+' FROM '+@tblName

set @strID = ' From ' + @tblName

end

else

begin

set @sqlTmp = + @fldName + 'From ' + @tblName + ' where (1>0) ' + @strCondition

set @strTmp = @SqlSelect+' @Counts='+@SqlCounts+' FROM '+@tblName + ' where (1>0) ' + @strCondition

set @strID = ' From ' + @tblName + ' where (1>0) ' + @strCondition

end

----取得查询结果总数量-----

exec sp_executesql @strTmp,N'@Counts int out ',@Counts out

declare @tmpCounts int

if @Counts = 0

set @tmpCounts = 1

else

set @tmpCounts = @Counts

--取得分页总数

set @pageCount=(@tmpCounts+@pageSize-1)/@pageSize

/**//**//**//**当前页大于总页数取最后一页**/

if @page>@pageCount

set @page=@pageCount

--/*-----数据分页2分处理-------*/

declare @pageIndex int --总数/页大小

declare @lastcount int --总数%页大小

set @pageIndex = @tmpCounts/@pageSize

set @lastcount = @tmpCounts%@pageSize

if @lastcount > 0

set @pageIndex = @pageIndex + 1

else

set @lastcount = @pagesize

--//***显示分页

if @strCondition is null or @strCondition='' --没有设置显示条件

begin

if @pageIndex<2 or @page<=@pageIndex / 2 + @pageIndex % 2 --前半部分数据处理

begin

if @page=1

set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName

+' order by '+ @fldSort +' '+ @strFSortType

else

begin

if @Sort=1

begin

set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName

+' where '+@ID+' <(select min('+ @ID +') from ('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName

+' order by '+ @fldSort +' '+ @strFSortType+') AS TBMinID)'

+' order by '+ @fldSort +' '+ @strFSortType

end

else

begin

set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName

+' where '+@ID+' >(select max('+ @ID +') from ('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName

+' order by '+ @fldSort +' '+ @strFSortType+') AS TBMinID)'

+' order by '+ @fldSort +' '+ @strFSortType

end

else

begin

set @page = @pageIndex-@page+1 --后半部分数据处理

if @page <= 1 --最后一页数据显示

set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@lastcount as VARCHAR(4))+' '+ @fldName+' from '+@tblName

+' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType

else

if @Sort=1

begin

set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName

+' where '+@ID+' >(select max('+ @ID +') from('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from '+@tblName

+' order by '+ @fldSort +' '+ @strSortType+') AS TBMaxID)'

+' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType

end

else

begin

set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName

+' where '+@ID+' <(select min('+ @ID +') from('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from '+@tblName

+' order by '+ @fldSort +' '+ @strSortType+') AS TBMaxID)'

+' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType

end

else --有查询条件

begin

if @pageIndex<2 or @page<=@pageIndex / 2 + @pageIndex % 2 --前半部分数据处理

begin

if @page=1

set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName

+' where 1=1 ' + @strCondition + ' order by '+ @fldSort +' '+ @strFSortType

else if(@Sort=1)

begin

set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName

+' where '+@ID+' <(select min('+ @ID +') from ('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName

+' where (1=1) ' + @strCondition +' order by '+ @fldSort +' '+ @strFSortType+') AS TBMinID)'

+' '+ @strCondition +' order by '+ @fldSort +' '+ @strFSortType

end

else

begin

set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName

+' where '+@ID+' >(select max('+ @ID +') from ('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName

+' where (1=1) ' + @strCondition +' order by '+ @fldSort +' '+ @strFSortType+') AS TBMinID)'

+' '+ @strCondition +' order by '+ @fldSort +' '+ @strFSortType

end

else

begin

set @page = @pageIndex-@page+1 --后半部分数据处理

if @page <= 1 --最后一页数据显示

set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@lastcount as VARCHAR(4))+' '+ @fldName+' from '+@tblName

+' where (1=1) '+ @strCondition +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType

else if(@Sort=1)

set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName

+' where '+@ID+' >(select max('+ @ID +') from('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from '+@tblName

+' where (1=1) '+ @strCondition +' order by '+ @fldSort +' '+ @strSortType+') AS TBMaxID)'

+' '+ @strCondition+' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType

else

set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName

+' where '+@ID+' <(select min('+ @ID +') from('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from '+@tblName

+' where (1=1) '+ @strCondition +' order by '+ @fldSort +' '+ @strSortType+') AS TBMaxID)'

+' '+ @strCondition+' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType

end

------返回查询结果-----

exec sp_executesql @strTmp

select datediff(ms,@timediff,getdate()) as 耗时

--print @strTmp

SET NOCOUNT OFF

执行示例：exec proc_paged_2part_selectMax 'tb_testTable','ID,userName,userPWD,userEmail',10,100000,'ID',0,null,'ID',0

这种测试只在单机进行，并且没有在实际开发WEB项目中分页测试，测试项也比较单一，所以不够全面系统，但从其效率相比上，我们可以在数据库分页算法上进行有效的控制。