https://school.programmers.co.kr/learn/courses/30/lessons/164672

-- 코드를 입력하세요
SELECT BOARD_ID, WRITER_ID, TITLE, PRICE,
     CASE WHEN UGB.STATUS = 'DONE' THEN '거래완료'
        WHEN UGB.STATUS = 'SALE' THEN '판매중'
        WHEN UGB.STATUS = 'RESERVED' THEN '예약중'
     END AS STATUS
FROM USED_GOODS_BOARD AS UGB
WHERE DATE(CREATED_DATE) = '2022-10-05'
ORDER BY BOARD_ID DESC

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