Commit 4598e74

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손지민: [SQL ] 저자 별 카테고리 별 매출액 집계하기_250215

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	`1`	`+SELECT`
	`2`	`+ a.AUTHOR_ID,`
	`3`	`+ a.AUTHOR_NAME,`
	`4`	`+ b.CATEGORY,`
	`5`	`+ SUM(bs.SALES * b.PRICE) AS TOTAL_SALES`
	`6`	`+FROM`
	`7`	`+ BOOK_SALES bs`
	`8`	`+ JOIN BOOK b ON bs.BOOK_ID = b.BOOK_ID`
	`9`	`+ JOIN AUTHOR a ON b.AUTHOR_ID = a.AUTHOR_ID`
	`10`	`+WHERE`
	`11`	`+ bs.SALES_DATE BETWEEN '2022年01月01日' AND '2022年01月31日'`
	`12`	`+GROUP BY`
	`13`	`+ a.AUTHOR_ID, b.CATEGORY`
	`14`	`+ORDER BY`
	`15`	`+ a.AUTHOR_ID, b.CATEGORY DESC;`

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