sql Server实现分页实例有哪些？

declare @index int,@num int
set @index = 1--当前页
set @num = 2--单页包含的行数
--分页1
select top (@num) *
from ppohd
where doccode not in
(
 select top (@num * (@index -1)) doccode
 from ppohd
 order by doccode
)
order by doccode
--分页2
select top (@num) *
from ppohd
where doccode >=
(
 select max(doccode)
 from
 (
  select top (@num * (@index - 1) + 1) doccode
  from ppohd
  order by doccode
 ) as tb
)
--分页3
select top (@num) *
from
(
 select ppohd.doccode as 'mydoccode',row_number() over (order by doccode) as sno,*
 from ppohd
) as tb
where tb.sno >= @num * (@index - 1) + 1
--分页4
select *
from
(
 select ppohd.doccode as 'mydoccode', row_number() over(order by doccode) as sno,*
 from ppohd
) as tb
where tb.sno between (@num * (@index - 1) + 1) and (@num * @index)