我不能太具体地回答你的问题，但你当然可以用$wpdb 实例到access another database:

$db = new wpdb(\'user\', \'password\', \'dbname\', \'dbhost\');
$results = $db->get_results(\'..query..\');

<?php
/* get the database configuration automatically starts here */

$server_url = $_SERVER["SERVER_NAME"];
$doc_root = $_SERVER["DOCUMENT_ROOT"];

require($doc_root . \'/wp-config.php\');


$post_id = 5;


query_posts( \'p=\' . $post_id );

global $more;
$more = 0;

// the Loop
while (have_posts()) : 
    the_title();
    the_content( \'Read the full post »\' );
endwhile;



?>