Materialized view and Order by clause

Question

Hi all. I'd like to have some information regarding the order by clause used in a materialized view.
I'm using Oracle 9.2 and Win2003 server. I have a common view (my_common_view) on which a materialized view is based (my_materialized_view). Materialized view is built for fast refresh and is created in this way:
create materialized view my_materialized_view as
select * from my_common_view
order by 1,2,3;
My question is: if I query this materialized view without adding an order by clause in the statement, I will obtain always an ordered result set? So, is it useful to include the order by clause in the materialized view script or the order by has to be include in the statement used for quering the materialized view (for example like this: select * from my_materialized view order by ...)?
Thank you very much.
Ste.

Answer 1

SQL> create table t
  2  (x int)
  3  /
Table created.
SQL> create view vw
  2  as
  3  select *
  4    from t
  5   order by x
  6  /
View created.
SQL> select *
  2    from v$version
  3  /
BANNER
Oracle9i Enterprise Edition Release 9.2.0.7.0 - 64bit Production
PL/SQL Release 9.2.0.7.0 - Production
CORE    9.2.0.7.0       Production
TNS for IBM/AIX RISC System/6000: Version 9.2.0.7.0 - Production
NLSRTL Version 9.2.0.7.0 - Production
SQL>