Population Census | hackerrank solution

 Population Census | hackerrank solution:-

Given the CITY and COUNTRY tables, query the sum of the populations of all cities where the CONTINENT is 'Asia'.

Note: CITY.CountryCode and COUNTRY.Code are matching key columns.

Input Format

The CITY and COUNTRY tables are described as follows:

Population Census | hackerrank solution:-

The objective of code is query the sum of the populations of all cities where the CONTINENT is 'Asia'.

Mysql code:-

select sum(c.population) from city c inner join country cc on c.countrycode=cc.code

where cc.continent='Asia'

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