drupal-use-other-db.txt

<?php
global $db_url;

$db_url_tmp = $db_url;

$db_url = array();
$db_url['default'] = $db_url_tmp;
$db_url['uk'] = 'mysqli:/*****:*****@*****/*****';

$result = db_set_active('uk');

$res = db_query("");

while ($row = db_fetch_array($res)) {
	  var_dump($row);
}

db_set_active('default');