Default installation prestashop included all the country in the world, as for me I don’t realy need all of them to be enable which because I’m only selling items in my local country only.

This which require me to disable all 200+ entry which is a tremendous clicking task, but someone posted this in the prestashop forum which only require 1 SQL query statement to disable all of the entry beside your choosing:

of course you need to change the ps_ to your database prefix

Cheers!