All right, let's move on and check out the
city table. There are different cities in each country, so the table lists information about them. It gives you the ID of the city and its name, the ID of the country where it can be found, the city population, the area in square kilometers and its rating, where 5 means "no better place to visit on earth" and 1 means "boring as hell".
How about the table
mountain? In each country there are some mountains, so the travel agency lists information about them too. The table stores columns with the ID, the name of the mountain, its height in meters and the ID of the country where it is located.
Not much happening here. Why don't we move on?