Retrieving a part of big result set at a time

Question

I will try to present a simplistic view of the problem at hand. I
want to display large volume of data on a web page. We are
interested in displaying 50 records and a time and want to
control it at the database level. I am looking at some option to
pass the database the information that I need 1-50 records from
the selected records (then 51-100 and so on).
I want to keep it as simple as possible and came up with this script:
select myrow, col1
     from (Select rownum myrow, col1 from mytable)
     where myrow > 0 and myrow < 51;
where mytable is a table with a column col1.
For the sake of simplicity I have removed other where clauses.
This options works but the data is not ordered. I want to
retrieve the data in ordered fashion and then retrieve first 50
and so on. I want to do something like:
select myrow, col1
     from (Select rownum myrow, col1
from mk
order by col1)
     where myrow > 2 and myrow < 4;
but Oracle does not let me put order by with the nested select.
Does anyone have a suggestion to resolve this issue? It could be
a totally different solution as long as it is straight forward.
Using a cursor or temp tables is not practical since it won't
meet our performance parameters.
Any suggestions ???
TIA

Answer 1

select tp2.col1, tp2.myrow
from (select rownum myrow, tp1.col1
from (Select col1
from mytable
order by col1) tp1
) tp2
where tp2.myrow > 0 and tp2.myrow < 51;