title: Default row ordering for select query in oracle
body: <p>In Oracle, what is the the default ordering of rows for a select query if no "order by" clause is specified. </p>
  
  <p>Is it </p>
  
  <ol>
  <li>the order in which the rows were inserted</li>
  <li>there is no default ordering at all</li>
  <li>none of the above.</li>
  </ol>