1.Show the population of Germany.
SELECT population FROM world
WHERE name = 'Germany';2.Show the name and the population for 'Sweden', 'Norway' and 'Denmark'.
SELECT name, population FROM world
WHERE name IN ('Sweden', 'Norway', 'Denmark');3.Show the country and the area for countries with an area between 200,000 and 250,000.
SELECT name, area FROM world
WHERE area BETWEEN 200000 AND 250000;