I am a new user in Oracle. In Oracle SQL Developer, whenever I want to create a new connection and fill the "New Database Connection" form, it gives me this error: -
ORA-12560: TNS:protocol adapter error
Please Help.
To add more to my comment on the question...
Ensure your database is open (has been started up).
database_name
>)Also, ensure the database you are trying to connect to has an entry in the tnsnames.ora
file your SQL Developer is using (depending upon your setup you may have a tnsnames.ora
for both your oracle client and database software if they are on the same physical hardware like your PC or laptop).