Milky's note

https://www.hackerrank.com/challenges/weather-observation-station-2/problem?isFullScreen=true Weather Observation Station 2 | HackerRank Write a query to print the sum of LAT_N and the sum of LONG_W separated by space, rounded to 2 decimal places. www.hackerrank.com [문제] Query the following two values from the STATION table: The sum of all values in LAT_N rounded to a scale of decimal places. Th..

https://www.hackerrank.com/challenges/earnings-of-employees/problem?isFullScreen=true Top Earners | HackerRank Find the maximum amount of money earned by any employee, as well as the number of top earners (people who have earned this amount). www.hackerrank.com [문제] We define an employee's total earnings to be their monthly salary * months worked, and the maximum total earnings to be the maximum..

https://www.hackerrank.com/challenges/the-blunder/problem?isFullScreen=true The Blunder | HackerRank Query the amount of error in Sam's result, rounded up to the next integer. www.hackerrank.com [문제] Samantha was tasked with calculating the average monthly salaries for all employees in the EMPLOYEES table, but did not realize her keyboard's 0 key was broken until after completing the calculation..

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: [답] -mysql select max(populatio..