[해커랭크 SQL] Aggregation - Population Density Difference

❓ Question
https://www.hackerrank.com/challenges/population-density-difference

Population Density Difference | HackerRank

❗ Answer

SELECT MAX(population) - MIN(population)
    FROM city;

📌 Discussion

• max - min으로 최댓값 - 최솟값 추출