How to Query Database Name in Oracle SQL Developer?

Question

How do I query the database name in Oracle SQL Developer? I have tried the following and they all fail:

SELECT DB_NAME();

SELECT DATABASE(

Answer 1

I know this is an old thread but you can also get some useful info from the V$INSTANCE view as well. the V$DATABASE displays info from the control file, the V$INSTANCE view displays state of the current instance.