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[level 4] Title: 오프라인/온라인 판매 데이터 통합하기, Time: 0.00 ms, Memory: 0.0 MB -BaekjoonHub
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프로그래머스/4/131537. 오프라인/온라인 판매 데이터 통합하기/README.md

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### 제출 일자
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2024년 08월 05일 13:08:37
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2025년 05월 14일 08:36:29
2020

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### 문제 설명
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SELECT DATE_FORMAT(SALES_DATE, '%Y-%m-%d')AS SALES_DATE, PRODUCT_ID, USER_ID, SALES_AMOUNT
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-- 코드를 입력하세요
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SELECT DATE_FORMAT(SALES_DATE, '%Y-%m-%d')as SALES_DATE, PRODUCT_ID, USER_ID, SALES_AMOUNT
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FROM ONLINE_SALE
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WHERE SALES_DATE >= '2022-03-01' AND SALES_DATE<='2022-03-31'
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UNION ALL
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SELECT DATE_FORMAT(SALES_DATE, '%Y-%m-%d')AS SALES_DATE, PRODUCT_ID, NULL AS USER_ID, SALES_AMOUNT
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WHERE
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YEAR(SALES_DATE) = 2022 AND MONTH(SALES_DATE) = 3
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UNION
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SELECT DATE_FORMAT(SALES_DATE, '%Y-%m-%d')as SALES_DATE, PRODUCT_ID, NULL AS USER_ID,SALES_AMOUNT
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FROM OFFLINE_SALE
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WHERE SALES_DATE >= '2022-03-01' AND SALES_DATE<='2022-03-31'
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order by SALES_DATE, PRODUCT_ID, USER_ID
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WHERE
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YEAR(SALES_DATE) = 2022 AND MONTH(SALES_DATE) = 3
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ORDER BY
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sales_date ASC,
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product_id ASC,
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user_id ASC;

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