SELECT DISTINCT(A.CAR_ID) FROM CAR_RENTAL_COMPANY_CAR A
JOIN CAR_RENTAL_COMPANY_RENTAL_HISTORY B
ON A.CAR_ID = B.CAR_ID
WHERE MONTH(B.START_DATE) = 10 AND A.CAR_TYPE = '세단'
ORDER BY A.CAR_ID DESC;

 

DISTINCT() : 중복 제거

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