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SQL 문제 31 - Revising Aggregations - Averages(HackerRank)

 SQL 문제 31 - Revising Aggregations - Averages(HackerRank)

SQL 문제 31 - Revising Aggregations - Averages(HackerRank) Revising Aggregations - Averages 풀이 SELECT AVG(POPULATION) FROM CITY WHERE DISTRICT = 'California'; * 출처 Revising Aggregations - Averages | HackerRank Query the average population of all cities in the District of California. www.hackerrank.com...

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# HackerRank # SQL_HackerRank # SQL_RevisingAggregations_Averages # SQL_RevisingAggregations_Averages_HackerRank