Z:\>sqlplus / as sysdba

SQL*Plus: Release 10.2.0.1.0 - Production on Fri Nov 6 14:54:24 2009

Copyright (c) 1982, 2005, Oracle.  All rights reserved.


Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options

SQL> alter user sys identified by tejajun20;

User altered.
SQL> conn sys/tejajun20 as sysdba
Connected.
SQL> alter user sys identified by password;

User altered.

SQL> conn sys/password as sysdba
Connected.
SQL> select name from v$database;

NAME
---------
SATYA

SQL> conn system/tejajun20
Connected.
SQL> select name from v$database;

NAME
---------
SATYA

SQL> alter user sys identified by sriram;

User altered.

SQL> conn  sys/sriram as sysdba;
Connected.
SQL> select name from v$database;

NAME
---------
SATYA

SQL>