https://school.programmers.co.kr/learn/courses/30/lessons/133026
https://school.programmers.co.kr/learn/courses/30/lessons/144855
💡 순서를 잘 기억하자!
SELECT
FROM
JOIN
ON
WHERE
GROUP BY
ORDER BY
https://school.programmers.co.kr/learn/courses/30/lessons/131116
WHERE IN AND IN 을 사용하여 조건을 만들었다!