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SQLSERVER2012 出新分页功能啦！！！
近两天我在自己工作机的PC（没有并发，单一线程）上做了SqlServer 2000/ (2005/2008)/2012三个版本下的分页性能比较。
大致可得出以下结果：
1、表数据量200W以内：SQLServer2012 的offset/fetch分页性能和SQLServer2005 Row_number的分页性能（仅考虑出结果速度）基本没区别（难分高下），略高于（大约10%）SQL2000的TOP分页性能。
2、表数据量2000W左右：SQLServer2012 的offset/fetch分页性能略高于SQLServer2005 Row_number的分页性能，主要体现在IO上，但是两者性能可算是远高于（大约25%）SQL2000的TOP分页性能。
3、执行计划2012比2005简单，2005比2000简单，学习简易程度，2012最容易实现。
特此分享一下，下面是我的测试脚本，有兴趣可以自己也试试
测试环境：
Microsoft SQL Server 2014 - 12.0.2000.8 (X64)
Feb 20 2014 20:04:26
Copyright (c) Microsoft Corporation
Enterprise Edition (64-bit) on Windows NT 6.1 <X64> (Build 7601: Service Pack 1)
/*
功能：生成测试数据.
*/
create table Test_paging(
id int identity(1,1) not null primary key,
TestNumber int not null,
TestName varchar(20) not null,
TestDept varchar(10) not null,
TestDate datetime not null
)
go
with tep(Number,Name,Dept,Date) as
(
select 1,cast(‘0_testname‘ as varchar(20)),cast(‘0_DBA‘ as varchar(10)),getdate()
union all
select Number+1,cast(cast(Number as varchar(20))+‘_testname‘ as varchar(20)),cast(cast(Number/500 as varchar(10))+‘_DBA‘ as varchar(10)) ,getdate()
from tep
where Number<=20000000
)
insert into Test_paging(TestNumber,TestName,TestDept,TestDate)
select Number,Name,Dept,Date from tep option(maxrecursion 0)
--添加索引（我有测试没有索引的情况，2012的优势更加明显，但是我们的数据库不可能不建索引的，故可忽略没有索引的情况）
create nonclustered index IX_TestDept on Test_paging(
TestDept
) include
(
TestName,TestDate
)
go
/*
功能：测试2012版本中offset/fetch分页.
*/
dbcc dropcleanbuffers
dbcc freeproccache
set statistics io on
set statistics time on
set statistics profile on
declare
@page int, --第@page页
@size int, --每页@size行
@total int --总行数
select @page=20,@size=10,@total=count(1) from Test_paging where TestDept = ‘1000_DBA‘
select
TestName,TestDept,TestDate,@total
from
Test_paging
where
TestDept = ‘1000_DBA‘
order by id offset (@page-1)*@size rows fetch next @size rows only
set statistics io off
set statistics time off
set statistics profile off
/*
功能：测试2005/2008版本中row_number分页.
*/
dbcc dropcleanbuffers
dbcc freeproccache
set statistics io on
set statistics time on
set statistics profile on
declare
@page int, --第@page页
@size int, --每页@size行
@total int
select @page=20,@size=10,@total=count(1) from Test_paging where TestDept = ‘1000_DBA‘
select TestName,TestDept,TestDate,@total from
(
select
TestName,TestDept,TestDate,row_number() over(order by ID) as num
from
Test_paging
where
TestDept = ‘1000_DBA‘
) test where num between (@page-1)*@size+1 and @page*@size order by num
set statistics io off
set statistics time off
set statistics profile off
/*
功能：测试2000版本中top分页.
*/
dbcc dropcleanbuffers
dbcc freeproccache
set statistics io on
set statistics time on
set statistics profile on
declare
@page int, --第@page页
@size int, --每页@size行
@total int --总行数
select @page=20,@size=10,@total=count(1) from Test_paging where TestDept = ‘1000_DBA‘
select TestName,TestDept,TestDate,@total from
(
select top(@size) id,TestName,TestDept,TestDate from
(
select top(@page*@size) id,TestName,TestDept,TestDate
from Test_paging
where TestDept = ‘1000_DBA‘
order by id
)temp1 order by id desc
)temp2 order by id
set statistics io off
set statistics time off
set statistics profile off
SQLServer2000到SQLServer2012三种分页方式比较
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原文地址：http://www.cnblogs.com/szDBA/p/4819860.html
