ok,我們首先創(chuàng)建一數(shù)據(jù)庫(kù)：data_test,并在此數(shù)據(jù)庫(kù)中創(chuàng)建一表：tb_testtable
create database data_test --創(chuàng)建數(shù)據(jù)庫(kù)data_test
go
use data_test
go
create table tb_testtable --創(chuàng)建表
(
id int identity(1,1) primary key,
username nvarchar(20) not null,
userpwd nvarchar(20) not null,
useremail nvarchar(40) null
)
go
然后我們?cè)跀?shù)據(jù)表中插入2000000條數(shù)據(jù):
--插入數(shù)據(jù)
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
我首先寫(xiě)了五個(gè)常用存儲(chǔ)過(guò)程：
1，利用select top 和select not in進(jìn)行分頁(yè)，具體代碼如下：
create procedure proc_paged_with_notin --利用select top and select not in
(
@pageindex int, --頁(yè)索引
@pagesize int --每頁(yè)記錄數(shù)
)
as
begin
set nocount on;
declare @timediff datetime --耗時(shí)
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后不支技直接接參數(shù)，所以寫(xiě)成了字符串@sql
select datediff(ms,@timediff,getdate()) as 耗時(shí)
set nocount off;
end
2,利用select top 和 select max(列鍵)
create procedure proc_paged_with_selectmax --利用select top and select max(列)
(
@pageindex int, --頁(yè)索引
@pagesize int --頁(yè)記錄數(shù)
)
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 耗時(shí)
set nocount off;
end
3,利用select top和中間變量--此方法因網(wǎng)上有人說(shuō)效果最佳，所以貼出來(lái)一同測(cè)試
create procedure proc_paged_with_midvar --利用id>最大id值和中間變量
(
@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 耗時(shí)
set nocount off;
end
4,利用row_number() 此方法為sql server 2005中新的方法,利用row_number()給數(shù)據(jù)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 耗時(shí)
set nocount off;
end
5，利用臨時(shí)表及row_number
create procedure proc_cte --利用臨時(shí)表及row_number
(
@pageindex int, --頁(yè)索引
@pagesize int --頁(yè)記錄數(shù)
)
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，存儲(chǔ)過(guò)程創(chuàng)建完畢，我們分別在每頁(yè)10條數(shù)據(jù)的情況下在第2頁(yè)，第1000頁(yè)，第10000頁(yè)，第100000頁(yè)，第199999頁(yè)進(jìn)行測(cè)試，耗時(shí)單位：ms 每頁(yè)測(cè)試5次取其平均值