Use SQL TimeDiff to populate PHP table data - php

Question

I have been searching Google for a good amount of time and I don't know if it is the way I am asking the question or what but I can not find anything even closely relevant to this. I have a PDO SQL statement :
try
{
$query = $dbh->prepare("SELECT id, anum, first, last, signintime, counselorname,
finishtime, TIMEDIFF(finishtime, signintime) AS Total_wait FROM inoffice;");
$query->execute();
$result = $query->fetchall();
}
catch (PDOException $e) {
error_log($e->getMessage());
die($e->getMessage());
}
and then I have a table structured like so :
<table id='datatables' class='display'>
<thead>
<tr>
<th>Session Id</th>
<th>A Number</th>
<th>First Name</th>
<th>Last Name</th>
<th>Signin Time</th>
<th>Counselor Name</th>
<th>Finish Time</th>
<th>Total Wait Time</th>
</tr>
</thead>
<tbody>
<?php
foreach($result as $row) {
?>
<tr>
<td><?=$row['id'] ?></td>
<td><?=$row['anum'] ?></td>
<td><?=$row['first'] ?></td>
<td><?=$row['last'] ?></td>
<td><?=$row['signintime'] ?></td>
<td><?=$row['counselorname'] ?></td>
<td><?=$row['finishtime'] ?></td>
<td><?= ?></td>
</tr>
<?php
}
?>
</tbody>
</table>
My question is how on earth do I get the final part of my PDO select in that final td tag of my table? the part I am confused on is :
TIMEDIFF(finishtime, signintime) AS Total_wait
I want that to be able to be included in the last td of the table. Any help / trick / work around be awesome.

Answer 1

You must treat TIMEDIFF(finishtime, signintime) AS Total_wait
as its own row from the database.
resulting in this :
<td><?=$row['Total_wait'] ?></td>
now the table looks and works great :