title: Is there a free Oracle database emulator?
body: <p>I need to test certain Oracle 11g queries in order to get some real practical experience, for instance, this query:</p>
  
  <pre><code>select TO_CHAR(TO_DATE('01-JAN-00', 'DD-MON-RR'), 'Day') from dual;
  </code></pre>
  
  <p>in order to be 100% that it returns 'One' and not the day of week, such as Monday, etc., and other such queries. </p>
  
  <p>Is there an online free Oracle database emulator? </p>
  
  <p>Thank you for assistance.</p>