First, connect to your Oracle instance as a privileged user and shut down the database by running shutdown immediate in SQL*Plus.
Next, start the Oracle instance in mount mode using the command startup mount. This will ensure the database is mounted but not open, allowing you to drop it safely.
Once in mount mode, execute the command drop database; in SQL*Plus. This will delete the database, including all associated data files, control files, and redo logs.
After dropping the database, manually remove any remaining data files, control files, and redo logs from the file system. You can do this using standard Linux or Windows commands.
On Windows, use the oradim command to remove any Oracle services linked to the database you just dropped. This ensures the services are no longer running.
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