Content selection through Jump menus's

Hi,
I have a list of schools data in my database which user/admin will enter. I want visitors to select the Country first (drop down list /auto complete field ) and then States in that country (drop down list /auto complete field ) and then cities in that state (drop down list/auto complete field ) and then Display the list of schools in that city with view more button for more details.
( Country>> State >> City>> List of Schools )

I am new to drupal. Please can help me with this.

Thanks Lot,
Chaithanya.