[oracle@zhongwc1 ~]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.3.0 Production on Wed Jan 23 17:02:01 2013
Copyright (c) 1982, 2011, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options
SQL> set lines 200
SQL> select instance_name,host_name from v$instance;
INSTANCE_NAME HOST_NAME
---------------- ----------------------------------------------------------------
zhongwc1 zhongwc1.oracle.com
SQL> select instance_name,host_name from gv$instance;
INSTANCE_NAME HOST_NAME
---------------- ----------------------------------------------------------------
zhongwc1 zhongwc1.oracle.com
zhongwc2 zhongwc2.oracle.com
SQL> select flashback_on from v$database;
FLASHBACK_ON
------------------
NO
SQL> show release
release 1102000300
SQL> alter database flashback on;
Database altered.
SQL> select flashback_on from v$database;
FLASHBACK_ON
------------------
YES
SQL> conn zwc
Enter password: