Сравнить две разные бд

<?
$db1 = mysql_connect('localhost', 'root', '',true) or die (mysql_error());
mysql_select_db('aaa',$db1) or die (mysql_error($db1));
 
$db2 = mysql_connect('localhost2', 'root', '',true) or die (mysql_error());
mysql_select_db('bbb',$db2) or die (mysql_error());
?>
            <?php
    $result55 = mysql_query("SELECT 'aaa' AS found_in, mini_img FROM aaa.date AS a WHERE NOT EXISTS (SELECT 1 FROM bbb.date AS b WHERE b.mini_img = a.mini_img)");
    if (mysql_num_rows($result55) > 0) {
       while ($myrow55 = mysql_fetch_array($result55)) {
echo ''.$myrow55[mini_img].'<br>';
}
}
?>

            <?php
    $result55 = mysql_query("SELECT title FROM aaa.date AS a WHERE (SELECT 'aaa' AS found_in, mini_img FROM aaa.date AS a WHERE NOT EXISTS (SELECT 1 FROM bbb.date AS b WHERE b.mini_img = a.mini_img))");
    if (mysql_num_rows($result55) > 0) {
       while ($myrow55 = mysql_fetch_array($result55)) {
echo ''.$myrow55[mini_img].' - '.$myrow55[title].'<br>';
}
}
?>