Commit c022392

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손지민: [SQL ] 오프라인/온라인 판매 데이터 통합하기_250223

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	`1`	`+SELECT DATE_Format(SALES_DATE, '%Y-%m-%d') as SALES_DATE, PRODUCT_ID, USER_ID, SALES_AMOUNT`
	`2`	`+FROM ONLINE_SALE`
	`3`	`+WHERE YEAR(SALES_DATE) = 2022 and MONTH(SALES_DATE) = 3`
	`4`	`+`
	`5`	`+UNION`
	`6`	`+`
	`7`	`+SELECT DATE_Format(SALES_DATE, '%Y-%m-%d') as SALES_DATE, PRODUCT_ID, NULL as USER_ID, SALES_AMOUNT`
	`8`	`+FROM OFFLINE_SALE`
	`9`	`+WHERE YEAR(SALES_DATE) = 2022 and MONTH(SALES_DATE) = 3`
	`10`	`+ORDER BY SALES_DATE, PRODUCT_ID, USER_ID`

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