Customzing sales Analysis using two table is it posiible in odoo 8 and 9?

In graph and pivot table view, x axis one table. y-axis another one table is this possible to show our data for analytical view if it possible give me some some example of using two tables as x and y axis how to customize, if not possible to use two table in x,y axis, why give me some pretty simple example for both of question?

thanks for your attention......!