Oracle Solution for Error ora-16000

Solution for Oracle Error ORA-16000

ORA-16000: database open for read-only access

What triggered the Error:

The database has been opened for read-only access. Attempts to modify the database using inappropriate DML or DDL statements generate this error.

What should we do to fix it:

In order to modify the database, it must first be shut down and re-opened for read-write access.