Sql分页语句

今天闲来无事，测试了一下用Sql分页语句，从网上找了一些数据，总结Sql分页分为5种：

--写法1，not in/top

select top 50 * from pagetest 

where id not in (select top 9900 id from pagetest order by id)

order by id



--写法2，not exists

select top 50 * from pagetest 

where not exists 

(select 1 from (select top 9900 id from pagetest order by id)a  where a.id=pagetest.id)

order by id



--写法3，max/top

select top 50 * from pagetest

where id>(select max(id) from (select top 9900 id from pagetest order by id)a)

order by id



--写法4，row_number()

select top 50 * from 

(select row_number()over(order by id)rownumber,* from pagetest)a

where rownumber>9900



select * from 

(select row_number()over(order by id)rownumber,* from pagetest)a

where rownumber>9900 and rownumber<9951



select * from 

(select row_number()over(order by id)rownumber,* from pagetest)a

where rownumber between 9901 and 9950



--写法5，在csdn上一帖子看到的，row_number() 变体，不基于已有字段产生记录序号，先按条件筛选以及排好序，再在结果集上给一常量列用于产生记录序号

select *

from (

    select row_number()over(order by tempColumn)rownumber,*

    from (select top 9950 tempColumn=0,* from pagetest where 1=1 order by id)a

)b

where rownumber>9900

 做一个简单的大数据测试，用一百万的数据,来检测一下上面五种sql语句的执行效率时间：

create database DBTest

use DBTest



--创建测试表

create table pagetest

(

id int identity(1,1) not null,

col01 int null,

col02 nvarchar(50) null,

col03 datetime null

)



--1万记录集

declare @i int

set @i=0

while(@i<1000000)

begin

    insert into pagetest select cast(floor(rand()*10000) as int),left(newid(),10),getdate()

    set @i=@i+1

end
---测试sql执行的时间语句
declare @begin_date datetime
declare @end_date datetime
select @begin_date = getdate()

<.....YOUR CODE.....>

select @end_date = getdate()
select datediff(ms,@begin_date,@end_date) as '毫秒'

 经过测试，用row_number()方法效率最为高效，用时最少；