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오늘도 배운다
The Blunder / HackerRank, SQL, MySQL 본문
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. She wants your help finding the difference between her miscalculation (using salaries with any zeros removed), and the actual average salary.
Write a query calculating the amount of error (i.e.: actual - miscalculated average monthly salaries), and round it up to the next integer.
제출답안(MySQL)
SELECT CEIL(AVG(salary) - AVG(REPLACE(salary, 0, '')))
FROM employees
문제 바로가기(MySQL)
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