Something

// Grab the members
$result = $db->query('SELECT u.*, g.* FROM '.$db->prefix.'users AS u LEFT JOIN '.$db->prefix.'groups AS g ON g.g_id=u.group_id WHERE u.group_id != 3 or u.group_id != 4 ORDER BY u.group_id ASC') or error('Unable to fetch users in group IDs 1/6', __FILE__, __LINE__, $db->error());