SQL> CREATE ROLE maintenance;
Role created.
SQL>
SQL> CREATE USER rich identified by rich;
User created.
SQL> CREATE USER brad identified by brad;
User created.
SQL> GRANT CONNECT TO rich, brad;
Grant succeeded.
SQL> GRANT maintenance TO rich, brad;
Grant succeeded.
SQL>
SQL> drop user rich;
User dropped.
SQL> drop user brad;
User dropped.
SQL> drop role maintenance;
Role dropped.