How to locate what you don't know, especially what view you want to query

How to locate what you don't know: especially to know which view to query. If I want to check what is related to role, I rely on dba_objects, so: SQL> select object_name from dba_objects where object_name like '% ROLE %'; www.2cto.com OBJECT_NAME descridba_roles includefrole $ ~jis $ ROLE_TRIGGER $ {{session_roles =dba_roles OBJECT_NA ME too many tables ROLE_SYS_PRIVS ROLE_TAB_PRIVS SESSION_ROLES USER_ROLE_PRIVS VBZ $ paivbz $ ROLE_GRANTS 19 rows selected? At most, you can check it at desc or test it again. Then, you can easily locate the document.
This is a long-term method for individuals who are not familiar with views. It is simple to say, but effective !!!!