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[HackerRank] Population Density Difference (MySQL) 본문
https://www.hackerrank.com/challenges/population-density-difference/problem?isFullScreen=true
Population Density Difference | HackerRank
Query the difference between the maximum and minimum city populations in CITY.
www.hackerrank.com
문제
Query the difference between the maximum and minimum populations in CITY.
Input Format
The CITY table is described as follows:
풀이
select max(population) - min(population)
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