sql server 实现分页

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)