[SQL문제풀기] 조건에 맞는 회원수 구하기

문제

내가 작성한 정답

SELECT COUNT(*)
FROM USER_INFO 
WHERE  (AGE BETWEEN 20 AND 29)
    AND (TO_CHAR(JOINED,'YYYY') = 2021);

SELECT COUNT(*)
FROM USER_INFO 
WHERE(AGE BETWEEN 20 AND 29)
    AND (DATE_FORMAT(JOINED,'%Y') = 2021);