-- create proc scroll_up
 
declare 
	@pos varchar( 10 ),
	@posmin varchar( 10 ),
	@posmax varchar( 10 )

set @pos = '003000'
 -- 20 up from "003000"
 
select top  20  * into # 1  from request where request_num <= @pos  order by request_num desc
select * from # 1  order by  1  asc
select @posmin = min(request_num) from # 1 
select @posmax = max(request_num) from # 1 
 /*
insert into #2 select * from #1 или делайте что хотите
*/ 
drop table # 1 
print @posmin
print @posmax
print ''

 -- create proc scroll_down
 
declare 
	@pos varchar( 10 ),
	@posmin varchar( 10 ),
	@posmax varchar( 10 )

set @pos = '003000'
 -- 20 down from "003000"
 
select top  20  * into # 1  from request where request_num >= @pos order by request_num asc
select * from # 1 
select @posmin = min(request_num) from # 1 
select @posmax = max(request_num) from # 1 
 /*
insert into #2 select * from #1 или делайте что хотите
*/ 
drop table # 1 
print @posmin
print @posmax
print ''