Algorithm
Problem Name: Sql -
In this HackerRank Functions in SQL problem solution,
Query the sum of the populations for all Japanese cities in CITY. The COUNTRYCODE for Japan is JPN.
Input Format
The CITY table is described as follows: 
Code Examples
#1 Code Example with SQL
Code -
SQL
SELECT SUM(POPULATION) FROM CITY
WHERE COUNTRYCODE = 'JPN';