How to find Oracle Service Name

I have an Oracle database on my network which I am able to connect to with Oracle SQL Developer, using hostname, port, username, password and the SID.

I need to connect another application (Quantum Gis), however it uses the Service Name instead of the SID.

Is there any way for me to determine the SERVICE_NAME of the database when I am connected in SQL Developer via the SID?

I do not have access to the server and have no local tnsnames.ora or similar.

Solution 1:

Found here, no DBA : Checking oracle sid and database name

select * from global_name;

Solution 2:

Connect to the server as "system" using SID. Execute this query:

select value from v$parameter where name like '%service_name%';

It worked for me.

Solution 3:

Overview of the services used by all sessions provides the distionary view v$session(or gv$session for RAC databases) in the column SERVICE_NAME.

To limit the information to the connected session use the SID from the view V$MYSTAT:

select SERVICE_NAME from gv$session where sid in (
select sid from V$MYSTAT)

If the name is SYS$USERS the session is connected to a default service, i.e. in the connection string no explicit service_name was specified.

To see what services are available in the database use following queries:

select name from V$SERVICES;
select name from V$ACTIVE_SERVICES;

Solution 4:

Thanks to this thread (https://community.oracle.com/thread/473276)

select sys_context('userenv','service_name') from dual;

It can be executed with a regular user account, no need for sysdba rights