You can shutdown the database and drop all files (Datafiles, Control
Files, ...).
And recreate it (I suppose that you have all scripts to do that)
-------------
Jérôme.
Use server manager (svrmgrxx on NT or svrmgrl on UNIX)
connect as internal
shutdown abort (or immidiate or normal or transactional)
exit server manager
use oradimxx (I don't know the syntax on UNIX) and delete the database
instance and services
delete database files
voila -- no database!!!
Read a previous posting in this newsgroup 'Creating a new database
procedure' written by Van Messner about creating a new database. Also
the oracle server documentation has anwers to questions like these.
Cheers,
Juhan