[프로그래머스 SQL 고득점 Kit] String, Date: 조건에 맞는 사용자 정보 조회하기

🤔 문제

✅ 정답

SELECT USER_ID, NICKNAME, CONCAT_WS(' ', CITY, STREET_ADDRESS1, STREET_ADDRESS2) AS 전체주소, 
    CONCAT_WS('-', SUBSTRING(TLNO, 1, 3), SUBSTRING(TLNO, 4, 4), SUBSTRING(TLNO, 8, 4)) AS 전화번호
FROM USED_GOODS_BOARD AS A JOIN USED_GOODS_USER AS B ON A.WRITER_ID = B.USER_ID
GROUP BY WRITER_ID
HAVING COUNT(WRITER_ID) >= 3
ORDER BY USER_ID DESC