What is the method for deleting a database in Oracle?

There are several methods to delete an Oracle database:

1. Use the SQL*Plus command line tool to execute the DROP DATABASE command to delete the entire database instance.
2. Delete a database instance using the Database Configuration Assistant (DBCA) tool.
3. Use Oracle Enterprise Manager (OEM) management tool to delete a database instance.
4. Manually delete database files and directories, including data files, control files, archived log files, etc., and delete the related directories and files in the operating system.

It is important to be cautious when deleting a database, make sure important data has been backed up and you have permission to operate the database. Deleting a database is irreversible, please be sure to double check before proceeding with the deletion.