title: find maximum without aggregate function
body: <p>I have the following schema for a table in SQL.</p>
  
  <pre><code>Owner (ownerid, name, phone, age)
  </code></pre>
  
  <p>I am asked to write a statement to find the oldest owner(s) in the database without using any aggregate function such as MAX. I'm also not allowed to use anything that is specific to any DBMS.</p>
  
  <p>Thanks for your help.</p>