通过xml将数据从一个数据库传递到另一个数据库

I have two mysql databases(phpmyadmin) "db_One" and "db_Two" on the same server.Both databases have common table named 'customer'. Customer table contains columns ,customer_id and customer_name. I need to update db_One from db_two every 30 minuets.How can I do that using xml or any other ways to do that? since I am new to xml I have no idea how to do this. I have two mysql databases(phpmyadmin) "db_One"