Japan Population URL : https://www.hackerrank.com/challenges/japan-population/problem Query the sum of the populations for all Japanese cities in CITY. The COUNTRYCODE for Japan is JPN. MyS...

Japanese Cities’ Attributes URL : https://www.hackerrank.com/challenges/japanese-cities-attributes/problem Query all attributes of every Japanese city in the CITY table. The COUNTRYCODE for J...

Japanese Cities’ Names URL : https://www.hackerrank.com/challenges/japanese-cities-name/problem Query the names of all the Japanese cities in the CITY table. The COUNTRYCODE for Japan is JPN....