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Hackerrank | MySQL | Revising Aggregations - The Sum Function 본문
데이터분석/practice_query
Hackerrank | MySQL | Revising Aggregations - The Sum Function
meal 2020. 8. 28. 09:33Revising Aggregations - The Sum Function
Revising Aggregations - The Sum Function | HackerRank
Query the total population of all cities for in the District of California.
www.hackerrank.com
Query the total population of all cities in CITY where District is California.
Solution
SELECT SUM(population)
FROM city
WHERE district = 'California''데이터분석 > practice_query' 카테고리의 다른 글
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