Average Population URL : https://www.hackerrank.com/challenges/average-population/problem Query the average population for all cities in CITY, rounded down to the nearest integer. MySQL, Or...
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...
Revising the Select Query II
Select By ID
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