没有来自工作的视图副本 - No view duplicate from work

如何防止重复记录从我的表:

<select name="web_site">
     <?php
        $query = $db->query("SELECT * FROM `work`");
        while ($row = mysql_fetch_array($query)) {
            print '<option value="'.$row['id'].'">'.$row['title'].'</option>';
        }
    ?>
</select>

$query = $db->query("SELECT * FROM `work` group by title");

<select name="web_site">
     <?php
        $query = $db->query("SELECT DISTINCT title FROM `work`");
        while ($row = mysql_fetch_array($query)) {
            print '<option value="'.$row['id'].'">'.$row['title'].'</option>';
        }
    ?>
</select>