How to retrieve data from the DB via Ajax without controller

[jumlancer]

I need to retrieve some data from #__virtuemart_order_histories in templates/active_tmpl/html/com_virtuemart/orders/details_history.php via Ajax. I know that I can do it with a new &task= in controller but is it possible to make the ajax query to the DB in the above file without touching Virtuemart core?

[VMCheckout]

You can use VM Import/Export Tools.

[toivo]

If you want to write your own PHP code, you can respond to the AJAX call in an external script that loads just the Joomla framework and accesses the database independently.