AVG as an analytic function - gives error ORA-0439

Question

I'm trying my first implementation of AVG as an analytic function. I took the following query which gave a simple average:
SELECT
PERSON.LASTNAME,
COUNT(TO_NUMBER(RPTOBS.OBSVALUE)) CNT,
AVG(TO_NUMBER(RPTOBS.OBSVALUE)) AVRG
FROM
TUT.PERSON PERSON,
TUT.RPTOBS RPTOBS
WHERE
PERSON.PID = RPTOBS.PID AND
RPTOBS.HDID = 54
GROUP BY
PERSON.LASTNAME;
and was rewrote this to give an average of the values of the last 3 dates (I think..)
SELECT
PERSON.LASTNAME,
RPTOBS.OBSDATE,
AVG(TO_NUMBER(RPTOBS.OBSVALUE))
OVER
(PARTITION BY PERSON.LASTNAME
ORDER BY RPTOBS.OBSDATE
ROWS BETWEEN UNBOUNDED PRECEDING AND 2 FOLLOWING)
AS AVRG3
FROM
TUT.PERSON PERSON,
TUT.RPTOBS RPTOBS
WHERE
PERSON.PID = RPTOBS.PID AND
RPTOBS.HDID = 54;
(this seemed to be a direct translation of a similar query in the SQL Reference.
I am getting an error message of:
ORA-0439 - feature not enabled - OLAP Window Functions
Can some one tell me why?
Thanks,
Will Salomon
[email protected]

Answer 1

I haven'y done it personally, but I am told that it's really as simple as de-insatlling the Standard Edition software and then installing the Enterprise Edition. Th einstaller will prompt you for an Oracle SID and you just have to point it to your existing database.
You may wish to test this proposition before risking your actual system. But, in any case, take a back up.
With 9i things are simpler: everyting gets installed, you're just not allowed to use the EE features if you haven't paid for them.
Cheers, APC