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SELECT CN.CONTINENT,FLOOR(AVG(C.POPULATION)) FROM CITY C INNER JOIN COUNTRY CN ON C.COUNTRYCODE=CN.CODE GROUP BY CN.CONTINENT;
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Average Population of Each Continent
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SELECT CN.CONTINENT,FLOOR(AVG(C.POPULATION)) FROM CITY C INNER JOIN COUNTRY CN ON C.COUNTRYCODE=CN.CODE GROUP BY CN.CONTINENT;