최대 1 분 소요

문제 링크

정답

-- BOOK: BOOK_ID, CATEGORY, AUTHOR_ID, PRICE, PUBLISHED_DATE
-- AUTHOR: AUTHOR_ID, AUTHOR_NAME

SELECT 
    B.BOOK_ID, 
    A.AUTHOR_NAME, 
    DATE_FORMAT(B.PUBLISHED_DATE, '%Y-%m-%d') AS PUBLISHED_DATE
FROM BOOK AS B
JOIN AUTHOR AS A
    ON B.AUTHOR_ID = A.AUTHOR_ID
WHERE B.CATEGORY = '경제'
ORDER BY 3;

✅ Point

  • JOIN을 사용해 BOOK, AUTHOR table 연결
  • DATE_FORMAT(대상 날짜, 형식) 으로 형식 통일