SQL

[프로그래머스] 카테고리 별 도서 판매량 집계하기

hminor 2023. 7. 13. 10:43
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SELECT T1.CATEGORY, SUM(T2.SALES) AS TOTAL_SALES
    FROM BOOK T1, BOOK_SALES T2
    WHERE T1.BOOK_ID = T2.BOOK_ID AND T2.SALES_DATE LIKE '2022-01%'
    GROUP BY T1.CATEGORY
    ORDER BY T1.CATEGORY