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[HackerRank/Aggregation] Revising Aggregations - Averages공부/PS ( SQL) 2022. 5. 18. 02:10
https://www.hackerrank.com/challenges/revising-aggregations-the-average-function/problem
Revising Aggregations - Averages | HackerRank
Query the average population of all cities in the District of California.
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문제
풀이
SELECT AVG(POPULATION) FROM CITY WHERE DISTRICT LIKE 'California''공부 > PS ( SQL)' 카테고리의 다른 글
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