MySQL提数据高分页效率

use TestForPaging
go

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

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

select count(*) from SomeData
go

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

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

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

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

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