we're going to implement the principle of the least privileges granted in an Oracle database.
How can we determine if a role or privilege granted some time ago is used these days. For example an year ago SELECT_CATALOG_ROLE was granted to application user ACCOUNTING. How can we determine what privileges are used through this role( SELECT_CATALOG_ROLE) and grant the privileges explicitely and revoke the role from user ACCOUNTING. We tried DBA_DEPENDENCIES but is it the right one ? Something else? Auditing or .... ?