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
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:
--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：
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--此方法因网上有人说效果最佳，所以贴出来一同测试
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< 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
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
更多信息请查看IT技术专栏