Help with php echo

 <?php
            
            $query = $conn->prepare("SELECT sup_id, sup_ticketnumber, sup_company, sup_contact, sup_email, sup_phone, sup_rep, sup_comments, sup_addcom1, sup_addcom2, sup_addcom3, sup_editcom1, sup_editcom2, sup_editcom3, sup_todo, sup_timefrom,  sup_timeto,  sup_date,  radnew, radinprogress, radclosed, radnocategory, chkemail, chkphone, chksms, chkproject FROM support ORDER BY sup_date asc");
            
            $query->execute();
            $results = $query->get_result();
            ?>
I need to echo out the sum of the sup_id column
Help please

Select allOpen in new window