sql problem -1 (joins)

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:

SELECT SUM(city.population)
FROM city
JOIN country ON city.countrycode = country.code
WHERE country.continent = ‘Asia’;