scott@9i > get 1
 1  create table mytable as
 2  select to_char(creation_time, 'RRRR Month') "Month",
 3  sum(bytes)/1024/1024 "Growth in Meg"
 4  from sys.v_
 5  where creation_time > SYSDATE-365
 6* group by to_char(creation_time, 'RRRR Month')
scott@9i > /

Table created.

scott@9i > select * from mytable;

Month          Growth in Meg
-------------- -------------
2005 February             50
2005 January            2175