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SELECT SUM(CITY.POPULATION) FROM CITY
LEFT JOIN COUNTRY ON CITY.COUNTRYCODE = COUNTRY.CODE
GROUP BY COUNTRY.CONTINENT
HAVING COUNTRY.CONTINENT = 'ASIA';
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Population Census
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SELECT SUM(CITY.POPULATION) FROM CITY LEFT JOIN COUNTRY ON CITY.COUNTRYCODE = COUNTRY.CODE GROUP BY COUNTRY.CONTINENT HAVING COUNTRY.CONTINENT = 'ASIA';