大数据量分页存储过程效率测试附测试代码与结果

MsSQL 2019-01-04

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
<div class="codetitle"><a style="CURSOR: pointer" data="21509" class="copybut" id="copybut21509" onclick="doCopy('code21509')"> 代码如下:

<div class="codebody" id="code21509">
create database data_Test --创建数据库
data_Test
GO
use data_Test
GO
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)
GO

然后我们在数据表中插入2000000条数据: <div class="codetitle"><a style="CURSOR: pointer" data="13223" class="copybut" id="copybut13223" onclick="doCopy('code13223')"> 代码如下:

<div class="codebody" id="code13223">
--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：
<div class="codetitle"><a style="CURSOR: pointer" data="91197" class="copybut" id="copybut91197" onclick="doCopy('code91197')"> 代码如下:

<div class="codebody" id="code91197">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
)
as
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)
<div class="codetitle"><a style="CURSOR: pointer" data="30718" class="copybut" id="copybut30718" onclick="doCopy('code30718')"> 代码如下:<div class="codebody" id="code30718">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
)
as
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,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
<div class="codetitle"><a style="CURSOR: pointer" data="12155" class="copybut" id="copybut12155" onclick="doCopy('code12155')"> 代码如下:<div class="codebody" id="code12155">create procedure proc_paged_with_Midvar --利用ID>最大ID值和中间变量
(
@pageIndex int,
@pageSize int
)
as
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,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
<div class="codetitle"><a style="CURSOR: pointer" data="94402" class="copybut" id="copybut94402" onclick="doCopy('code94402')"> 代码如下:<div class="codebody" id="code94402">create procedure proc_paged_with_Rownumber --利用sql 2005中的Row_number()
(
@pageIndex int,
@pageSize int
)
as
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,getdate()) as 耗时
set nocount off;
end

5，利用临时表及Row_number
<div class="codetitle"><a style="CURSOR: pointer" data="21105" class="copybut" id="copybut21105" onclick="doCopy('code21105')"> 代码如下:<div class="codebody" id="code21105">create procedure proc_CTE --利用临时表及Row_number
(
@pageIndex int,--页索引
@pageSize int --页记录数
)
as
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。 <div class="codetitle"><a style="CURSOR: pointer" data="40995" class="copybut" id="copybut40995" onclick="doCopy('code40995')"> 代码如下:<div class="codebody" id="code40995">
--/-----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
)
AS
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
end
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
end
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
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
end ------返回查询结果-----
exec sp_executesql @strTmp
select datediff(ms,getdate()) as 耗时
--print @strTmp
SET NOCOUNT OFF
GO

执行示例：exec proc_paged_2part_selectMax 'tb_testTable','ID,userEmail',10,100000,'ID',null,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。

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