Sql Server 存储过程分页

create proc usp_GetMyPhotos
@pageIndex int,   --当前页码
@pageSize int,   --每页多少条
@pageCount int output  --计算  总共多少页
as
declare @count int --总共多少条
select @count =COUNT(*) from room
set @pageCount = CEILING( @count*1.0/@pageSize)
select * from
(select *,ROW_NUMBER() over(order by ids desc) as num
from room) as t
where num between @pageSize*(@pageIndex-1) + 1 and @pageSize*@pageIndex

declare @n int
exec usp_GetMyPhotos 4,3,@n output
print @n