title: get one result from a query
body: <p>I tried doing this, </p>
  
  <pre><code>//returns the last updated id
  $val = $DB-&gt;GetOne("SELECT id FROM table_name ORDER BY id DESC LIMIT 0,1");
  </code></pre>
  
  <p>But it doesn't work unless I do <code>$DB-&gt;GetRow()</code>. So, does this mean that I need to have where clause for the <code>GetOne()</code> to work?</p>