This depends on what is your minimum business requirements that you want to achieve here.
As I understand from your description, if its just review of the Oracle DB IDs that you want to achieve and not access request/provisioning from SailPoint - you should be able to build something outside SailPoint that can talk to all these DB and dump the DB ID along with their access in file. The file then can be simply onboarded to SailPoint using delimited connector and you can do access review. You will process revokes from access review through either workitem or some kind of Service desk integration (better if you already have this in place).
If you need full fledged application management for these DB application (read full JML scenarios) then this would be quite complex.