how to add dbname column , when I query dba_users

COL USERNAME FORM A20

COL PROFILE FORM A30

SELECT USERNAME, PROFILE FROM DBA_USERS WHERE USERNAME IN ('USER1','USER2');

I am looking to get a dbname, but seems there is no way..

I am looking for below result

DB_NAME, USERNAME, PROFILE

and also

can we result as below to

DB_NAME, USER1, PROFILE, USER2, PROFILE ...............................

Thanks

Srihari