title: Unlocking account in Oracle 11g R2
body: <p>I know this question has been asked many times, but this problem is confusing me a lot. I just installed <code>Oracle 11g R2</code>. And I was trying to unlock <code>Scott/Tiger account</code> so that I can use them to make a  <code>SQL Developer connection</code>. I was trying to do something like below- And I always get user <code>SCOTT</code> does not exist? Why is it so? Is there anything wrong I am doing?</p>
  
  <pre><code>SQL&gt; conn system/abcdef1234
  Connected.
  SQL&gt; alter user scott account unlock;
  alter user scott account unlock
             *
  ERROR at line 1:
  ORA-01918: user 'SCOTT' does not exist
  </code></pre>
  
  <p>Any thoughts will be appreciated.</p>
  
  <p><strong>Updates:-</strong></p>
  
  <pre><code>SQL&gt; select username,account_status from dba_users where username='SCOTT'; 
  no rows selected
  </code></pre>