title: Group By Not working - only displaying 1st entry
body: <p>I have over 40'000 entries and each is assigned to a "list_name"</p>
  
  <p>I am basically trying to get just the list_name value echo'd out</p>
  
  <pre><code>$groupq = mysqli_query($dbc, "SELECT * FROM `products-full` GROUP BY `list_name`");
  $groupr = mysqli_fetch_assoc($groupq);
  do {
          echo $groupr['list_name'];
  } while($groupr = mysqli_fetch_assoc($groupq));
  </code></pre>
  
  <p>however its only displaying 1 entry then no more ..</p>
  
  <p><a href="https://imgur.com/a/3rnXGet" rel="nofollow noreferrer">https://imgur.com/a/3rnXGet</a></p>