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Top Earners Problem 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 We define an employee's total earnings to be their monthly salaryXmonths worked, and the maximum total earnings to be the maximum total earnings for any employee in the Employee table. Write a query to ..

The Blunder Problem The Blunder | HackerRank Query the amount of error in Sam's result, rounded up to the next integer. www.hackerrank.com Samantha was tasked with calculating the average monthly salaries for all employees in the EMPLOYEES table, but did not realize her keyboard's key was broken until after completing the calculation. She wants your help finding the difference between her miscal..

Population Density Difference Problem Population Density Difference | HackerRank Query the difference between the maximum and minimum city populations in CITY. www.hackerrank.com Query the difference between the maximum and minimum populations in CITY. SELECT MAX(population) - MIN(population) FROM city

Japan Population Problem Japan Population | HackerRank Query to the sum of the populations of all Japanese cities in CITY. www.hackerrank.com Query the sum of the populations for all Japanese cities in CITY. The COUNTRYCODE for Japan is JPN. SELECT SUM(population) FROM CITY WHERE countrycode = 'JPN'

Average Population Problem Query the average population for all cities in CITY, rounded down to the nearest integer. SELECT FLOOR(AVG(population)) FROM city

Revising Aggregations - Averages Problem Revising Aggregations - Averages | HackerRank Query the average population of all cities in the District of California. www.hackerrank.com Query the average population of all cities in CITY where District is California. SELECT AVG(population) FROM city WHERE district = 'California'

Revising Aggregations - The Sum Function Problem 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'

Revising Aggregations - The Count Function Problem Revising Aggregations - The Count Function | HackerRank Query the number of cities having populations larger than 100000. www.hackerrank.com Query a count of the number of cities in CITY having a Population larger than100,000. - solution SELECT COUNT(*) FROM city WHERE population > 100000