How to properly design a database table that should store a mailing address?

Question

SQL

There are 3 tables "Countries", "Regions", "Cities".

I have a "Companies" table that contains all information about a company (name, UNP, and so on). There should also be information that contains the address of the company.
How should this "Companies" table look like:
- contains a city column, a region column, a country column
- or contains one VARCHAR type field named "address"

I also have an "Orders" table, which should also contain the data "Loading address" , "Discharge address".

This table must contain one field "address" of type VARCHAR(45), for example, or you need to create a table "address" separately, in which there will be columns (id, country, city,