Hi

I did the following :

alter system set compatible='8.1.7' scope=spfile;

when i start up the database again, i got the following error:

ORA-00402: database changes by release 9.2.0.0.0 cannot be used by release
8.1.7.0.0
ORA-00405: compatibility type "Locally Managed SYSTEM tablespace"

How do i set the compatible parameter to a lower version??