Php, Mysql distinctor grouped query - php

Question

I'm struggling, creating a mysql query for the following scenario:
Array
(
[0] => stdClass Object
(
[id] => 1
[qid_id] => 1
[user_id] => 1
[question] => Favorite Place
[answer] => New York
[username] => john
)
[1] => stdClass Object
(
[id] => 2
[qid_id] => 1
[user_id] => 1
[question] => Additional Info
[answer] => N/A
[username] => john
)
[2] => stdClass Object
(
[id] => 3
[qid_id] => 1
[user_id] => 1
[question] => Favorite Place
[answer] => London
[username] => peter
)
[3] => stdClass Object
(
[id] => 4
[qid_id] => 1
[user_id] => 1
[question] => Additional Info
[answer] => N/A
[username] => peter
)
[4] => stdClass Object
(
[id] => 5
[qid_id] => 1
[user_id] => 2
[question] => Favorite Place
[answer] => Sidney
[username] => mike
)
[5] => stdClass Object
(
[id] => 6
[qid_id] => 1
[user_id] => 2
[question] => Additional Info
[answer] => N/A
[username] => mike
)
)
I'm trying to display data in html table, and so far I got the following:
$sql = "SELECT DISTINCT question"
. "\n FROM faq "
. "\n WHERE qid_id = 1";
$data = $db->fetchAll($sql);
$sql2 = "SELECT f.*, u.username"
. "\n FROM faq as f"
. "\n LEFT JOIN users as u on u.id = f.user_id "
. "\n WHERE f.qid_id = 1";
$data2 = $db->fetchAll($sql2);
<table>
<thead>
<tr>
<?php
print "<th>USERNAME</th>";
for ($i = 0; $i < count($data); $i++) {
print "<th>" . $data[$i]->question . "</th>";
}
?>
</tr>
</thead>
<tbody>
The above works fine, I'm having problem displaying the rest of the table, using second query ($data2). I'm not sure how to group fields in order to get unique results for each row.
The idea is to have something like:
USERNAME Favorite Place Additional Info
john New York N/A
peter London N/A
mike Sidney N/A