interval partitioning on a number column

Hi ,

I have got a requirement for interval partitioning of a column which contains date whose data type is number .

I have asked to do a partitioning for 3 months .Can anyone get me a syntax for doing it .Thanks in advance .

I tried the below syntax .But was not able to get partitioning for 3 months .

create table test

( prod_id number,

   prod_code varchar2(3),

   release_date number

)

partition by range(release_date)

interval(300)

(partition empty values less than (20000301) )

/

Regards,

Nash