1. Get in SQLPlus:
C:/>sqlplus /nolog
2. Log in as sysdba
SQL> conn username/password as sysdba
3. Startup databas
SQL> startup mount;
4. Start up listener:
Go back to command line: C:/lsnrctl start
5. start instance
Log in as sysdba SQL> alter database open;
6. startup console
Go back to command line: emctl start dbconsole
