Jquery Datatables plugin

Question

I want to see any example where i can see the data coming from many tables like I have a user Table in which I have ( userid,name,country) i am saving country integer value from dropdown in it like (1,NONAME,2) basically country itself is having a table havine(countryId,name) so country is used as foriegn key in my user table , how to show username with country name in jquerydatatables