五种SQL Server分页存储过程的方法及性能比较

2024-08-31 01:03:11

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本文主要介绍了SQL Server数据库分页的存储过程的五种方法以及它们之间性能的比较，并给出了详细的代码，希望能够对您有所帮助。

在SQL Server数据库操作中，我们常常会用到存储过程对实现对查询的数据的分页处理，以方便浏览者的浏览。本文我们总结了五种SQL Server分页存储过程的方法，并对其性能进行了比较，接下来就让我们来一起了解一下这一过程。

创建数据库data_Test ：

create database 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

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

1、利用select top 和select not in进行分页

具体代码如下：

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

)

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)

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,@timediff,GetDate()) as 耗时

set nocount off;

end

3、利用select top和中间变量

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,@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

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,@timediff,getdate()) as 耗时

set nocount off;

end

5、利用临时表及Row_number

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