조건에 맞는 회원수 구하기.cql

// 문제 링크 : https://school.programmers.co.kr/learn/courses/30/lessons/131535

SELECT
   COUNT(*) AS 'USERS'
FROM
    USER_INFO
WHERE
    AGE >= 20 AND AGE <= 29
    AND YEAR(JOINED) = 2021;