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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.orafile your SQL Developer is using (depending upon your setup you may have atnsnames.orafor both your oracle client and database software if they are on the same physical hardware like your PC or laptop).