How to mirror the privileges of an user to another in Oracle Database?
Get all privileges from AAA

 SELECT DBMS_METADATA.GET_GRANTED_DDL('ROLE_GRANT','AAA') FROM DUAL;

 SELECT DBMS_METADATA.GET_GRANTED_DDL('SYSTEM_GRANT','AAA') FROM DUAL;

 SELECT DBMS_METADATA.GET_GRANTED_DDL('OBJECT_GRANT','AAA') FROM DUAL;


Change the DDL commands with the user 'BBB' and execute.