sqlserver 分页存储过程

--分页
--求  共多少页pageCount   当前页的数据
--已知  1 每页显示几条   pageSize    2 当前页码 pageIndex

select 6/3
select CEILING( 7.0/3)


--第一页    pageSize=3
select * from
(select *,ROW_NUMBER() over(order by ptime desc) as num from photos) as t
where num between 1 and 3 order by  ptime desc
--第二页
select * from
(select *,ROW_NUMBER() over(order by ptime desc) as num from photos) as t
where num between 4 and 6 order by  ptime desc

--第三页
select * from
(select *,ROW_NUMBER() over(order by ptime desc) as num from photos) as t
where num between 7 and 9 order by  ptime desc

--第pageIndex页  pageSize=3
select * from
(select *,ROW_NUMBER() over(order by ptime desc) as num from photos) as t
where num between (pageIndex-1)*pageSize+1 and pageIndex*pageSize order by  ptime desc



--分页的存储过程   
create proc usp_photos
    @pageIndex int,        --当前页码
    @pageSize int,        --页容量
    @pageCount int output  --共多少页 输出参数
as
    declare @count int
    select @count=COUNT(*) from Photos
    set @pageCount = CEILING( @count*1.0/@pageSize)

    select * from
(select *,ROW_NUMBER() over(order by ptime desc) as num from photos) as t
where num between (@pageIndex-1)*@pageSize+1 and @pageIndex*@pageSize order by  ptime desc




--测试存储过程
declare @n int
exec usp_photos 2,2,@n output
print @n

use myphotos    
select * from PhotoType