I have Oracle database installed on my Windows (Windows 7) PC.
I have attached the screenshot of the location where the Oracle is installed.
Now I try to connect as sysdba:
SQL*Plus: Release 220.127.116.11.0 Production on Wed Nov 20 09:30:38 2013
Copyright (c) 1982, 2010, Oracle. All rights reserved.
SQL> connect sys as sysdba
ORA-12560: TNS:protocol adapter error
Is there any way I could troubleshoot the above error so that I could connect to the database as sysdba. I do not remember any other login of the database. Or could you help me install the database in case it is not installed?
I mostly use this Oracle installation as an Oracle client for sqlplus. Thanks a lot.