Checking Roles Granted to a User : Roles « User Privilege « Oracle PL/SQL Tutorial

You can check which roles have been granted to a user by querying user_role_privs. A user who creates a role is also granted that role by default.

SQL> desc user_role_privs;
 Name                  Type              Description
 USERNAME                    VARCHAR2(30) --Name of the user to whom the role has been granted.
 GRANTED_ROLE                VARCHAR2(30) --Name of the role granted to the user.
 ADMIN_OPTION                VARCHAR2(3)  --Whether the user is able to grant the role to another user or role. Equal to YES or NO.
 DEFAULT_ROLE                VARCHAR2(3)  --Whether the role is enabled by default when the user connects to the database. Equal to YES or NO.
 OS_GRANTED                  VARCHAR2(3)  --Whether the role was granted by the operating system.

SELECT * FROM user_role_privs;

36.7.2.Creating Roles
36.7.3.Granting Privileges to Roles
36.7.4.Granting Roles to a User
36.7.5.Assign Role to User
36.7.6.Checking Roles Granted to a User
36.7.7.Checking System Privileges Granted to a Role
36.7.8.Checking Object Privileges Granted to a Role
36.7.9.Assign CONNECT and RESOURCE Roles
36.7.10.Default Roles
36.7.11.Revoking a Role
36.7.12.Revoking Privileges from a Role
36.7.13.Dropping a Role
36.7.14.Regina and Kristen are manager level users
36.7.15.Rich and Brad are maintenance level users
36.7.16.Unassign Role
36.7.17.Drop Role
36.7.18.Assign object privileges to roles
36.7.19.Unassign Role from User
36.7.20.Output session roles from procedure
36.7.21.Query user granted roles