Problem Name: Sql -
In this HackerRank Functions in SQL problem solution,
Given the CITY and COUNTRY tables, query the names of all the continents (COUNTRY.Continent) and their respective average city populations (CITY.Population) rounded down to the nearest integer.
Note: CITY.CountryCode and COUNTRY.Code are matching key columns.
The CITY and COUNTRY tables are described as follows:
#1 Code Example with MySQL
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SELECT COUNTRY.CONTINENT, FLOOR(AVG(CITY.POPULATION)) FROM CITY INNER JOIN COUNTRY ON CITY.COUNTRYCODE = COUNTRY.CODE GROUP BY COUNTRY.CONTINENT;