Can we Filter the records using ROW_NUMBER() funtion?

Question

Oracle 10G
Hi all,
In the below query i used ROW_NUMBER() function to get the rownum value after descending order the results.
How Can i filter the first 10 rows without using a subquery?
I tried to use alias names but it doesn't work. Is there a way or it should be done only with subqueries?
select article_type_id,
article_type_desc,
ROW_NUMBER() OVER ( order by article_type_id desc) rnum
from s_article_types
Results are
ARTICLE_TYPE_ID     ARTICLE_TYPE_DESC     RNUM
37     Non-Degree News     1
36     Career News     2
35     ET News     3
34     Hotcourses 2.0 General     4
33     Hotcourses 2.0 Permanent     5
32     Hotcourses 2.0 News     6
1 General news 37
Thanks in advance

Answer 1

You can do
select * from
  select article_type_id, 
  article_type_desc,
  ROW_NUMBER() OVER ( order by article_type_id desc) rnum
  from s_article_types
where rnum <= 10You can't do it direct.