DISTINCT - download the content again - php

Question

this is how I should use distinct to download the content again.
Here at pictures VISR it to the download content 3 times, but I only want it 1 time in total
what is the problem is that it does not pick all of them, but I only want it to pick up only one of time, which means that it only need to download one time by title and simultaneously username.
$sql = "SELECT DISTINCT fms_bruger.fornavn, fms_bruger.efternavn, fms_opslagpm.id, fms_opslagpm.title FROM fms_bruger INNER JOIN fms_opslagpm ON fms_bruger.id=fms_opslagpm.fra_id WHERE fms_opslagpm.til_id = ? ORDER BY fms_opslagpm.datotid DESC";
if ($stmt = $this->mysqli->prepare($sql)) {
$stmt->bind_param('i', $id);
$id = $_SESSION["id"];
$stmt->execute();
$stmt->bind_result($fornavn, $efternavn, $id, $title);
while ($stmt->fetch()) {
?>
<tr class="postbox">
<td class="beskedinfo">
<p><?php echo $fornavn . " " . $efternavn;?></p>
</td>
<td>
<?php echo $title;?>
</td>
<td>
Slet
</td>
</tr>
<?php
}
$stmt->close();
}

Answer 1

You need to use GROUP BY not DISTINCT to get the grouping of the title field.
SELECT fms_bruger.fornavn, fms_bruger.efternavn, fms_opslagpm.id, fms_opslagpm.title
FROM fms_bruger
INNER JOIN fms_opslagpm ON fms_bruger.id=fms_opslagpm.fra_id
WHERE fms_opslagpm.til_id = ?
GROUP BY fms_opslagpm.title
ORDER BY fms_opslagpm.datotid DESC

Answer 2

SELECT DISTINCT does exactly what it says: it selects distinct rows.
You include id in the columns. I'm pretty sure IDs will be unique, therefore all rows are DISTINCT.
Consider removing the DISTINCT keyword and adding a GROUP BY `fms_bruger`.`title` clause. This is an extension to the SQL standard which will return an arbitrary row for each unique title.