title: SQL Commandline login error: sp2-0306
body: <p>I'm simply trying to logon to a newly installed Oracle Database 11g Express Edition (Windows) using the "Run SQL Command Line" from the start menu.
  As specified on <a href="https://docs.oracle.com/cd/E17781_01/admin.112/e18585/toc.htm#XEGSG110" rel="nofollow">Oracle® Database Express Edition Getting Started Guide</a>, I'm using the following commands:</p>
  
  <pre><code>SQL&gt; connect
  Enter user-name: system
  Enter password: &lt;password-for-system&gt;
  </code></pre>
  
  <p>But the logon fails with the following error:</p>
  
  <pre><code>SQL&gt; connect
  Enter user-name: system
  Enter password:
  SP2-0306: Invalid option.
  Usage: CONN[ECT] [{logon|/|proxy} [AS {SYSDBA|SYSOPER|SYSASM}] [edition=value]]
  where &lt;logon&gt; ::= &lt;username&gt;[/&lt;password&gt;][@&lt;connect_identifier&gt;]
        &lt;proxy&gt; ::= &lt;proxyuser&gt;[&lt;username&gt;][/&lt;password&gt;][@&lt;connect_identifier&gt;]
  </code></pre>
  
  <p>Where am I going wrong here?</p>