sqlplus /nolog
> sqlplus /nolog SQL*Plus: Release 9.2.0.6.0 - Production on Wed Sep 14 10:26:21 2011 Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved. SQL> show user USER is ""
• Not connecting to any user
• Not connecting to any instance/database
sqlplus /as sysdba
> sqlplus "/as sysdba" SQL*Plus: Release 9.2.0.6.0 - Production on Wed Sep 14 10:29:25 2011 Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved. Connected to: Oracle9i Enterprise Edition Release 9.2.0.6.0 - Production With the Partitioning option JServer Release 9.2.0.6.0 - Production SQL> show user USER is "SYS"
• Connected to user “SYS”
• Connected to database with the ORACLE_SID environment variable and sysdba authority
