define a role as a global role, which means that a user can only be authorized to use the role by an enterprise directory service.

  

CREATE ROLE supervisor IDENTIFIED GLOBALLY;

drop role supervisor;
--

1.	Creating a Role
2.	use a password when a role is authorized by the database
3.	Assign CONNECT and RESOURCE Roles
4.	Assign Role to User
5.	Drop Role
6.	Get two database users and show their roles.
7.	Output session roles from procedure
8.	Grant Permissions to Role
9.	Unassign Role

define a role as a global role, which means that a user can only be authorized to use the role by an enterprise directory service. : Role « User Previliege « Oracle PL / SQL