MySQL提数据高分页效率

我的这段代码是大数据量时提高分页的效率的测试代码
--提高分页效率:实现分页时只读取显示数据,需要先在数据库创建数据库“TestForPaging”

use TestForPaging
go

--创建表SomeData

create table SomeData
(
id int primary key,
name varchar(30) null,
description text
)
go

--插入数据

insert into SomeData values(1,'num1','第1条')
go
insert into SomeData values(2,'num2','第2条')
go
insert into SomeData values(3,'num3','第3条')
go
insert into SomeData values(4,'num4','第4条')
go
insert into SomeData values(5,'num5','第5条')
go

--数据条目总数

select count(*) from SomeData
go

--给每条记录添加一个数据级别

select name,description,ROW_NUMBER() over(order by id desc)as dataLevel from SomeData
go

--查看指定的数据级别间的数据条目

select dataLevel,name,description from
(select name,description,row_number() over(order by id desc)as dataLevel from SomeData)
 as datawithleverl where dataLevel between 2 and 4
go

--实现查看指定的数据级别间的数据条目的存储过程

create procedure GetDataPaged
(
@startRowIndex int,
@maximumRows int,
@sort varchar
)
AS

--确保指定sort

if len(@sort)=0
set @sort='id'

--带参数的查询

select dataLevel,name,description from
(select name,description,row_number() over(order by @sort desc)as dataLevel from SomeData) AS datawithleverl
WHERE dataLevel > (@startRowIndex*10) AND dataLevel <= (@startRowIndex*10 + @maximumRows)
go

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