Change Oracle password after installation.

To change a password after installation:

1. Start SQL*Plus:
   
   

   C:\> sqlplus /NOLOG
   
   

2. Connect as SYSDBA:
   
   

   SQL> CONNECT / AS SYSDBA

   Action	SQL Statement
   Unlock a password	ALTER USER username ACCOUNT UNLOCK;
   Lock a password	ALTER USER username ACCOUNT LOCK;
   Change password of an unlocked account	ALTER USER username IDENTIFIED BY password;
   Change password of a locked account	ALTER USER username IDENTIFIED BY password ACCOUNT UNLOCK;

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