I installed Oracle 11gR2 server in my machine. OS is Windows 2008 64 bit server.
I am the administrator of the machine and also included in ora_dba group.
But when I try to login in the same machine where server is installed as "sqlplus / as sysdba" its giving error like
ora-12560 TNS Protocol adapter error.
I started oracle services in the machine also.
I set ORACLE_SID also as there in tnsnames. ora at the command prompt.
Still am getting the error. What else I can check?
Can you please suggest all the possible options to avoid this error and get connected to idle instance?