HackerRank SQL

Given the CITY and COUNTRY tables, query the names of all cities where the CONTINENT is ‘Africa’.

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

Input Format

The CITY and COUNTRY tables are described as follows:

Solution (MySQL):

select city.name
from city
join
(
select * from country where continent = 'Africa'
) t
on city.countrycode = t.code
;

Link

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