Population Census
문제
코드
Oracle
SELECT SUM(CITY.POPULATION)
FROM CITY
INNER JOIN COUNTRY ON CITY.COUNTRYCODE = COUNTRY.CODE
WHERE COUNTRY.CONTINENT = 'Asia';
SELECT SUM(CITY.POPULATION)
FROM CITY
INNER JOIN COUNTRY ON CITY.COUNTRYCODE = COUNTRY.CODE
WHERE COUNTRY.CONTINENT = 'Asia';