Filtron of Country / City

A need that I have to create a filter that corresponds to a particular country and then select country and display all the cities that corresponds to the country in question.

Is this possible.

Hello

yes many of our users have done this, by creating a select field, and entering the country codes and names there

or (for select field) you can use a SQL query too,

you can find a country list on the internet and then enter it with appropriate format in the "elements" parameter of a select field

or if you find a DB table on the internet you can also use a DB query