[SQL문제풀기] 없어진 기록 찾기

문제

MYSQL, ORACLE

작성한 정답

SELECT O.ANIMAL_ID, O.NAME
FROM ANIMAL_INS I
RIGHT JOIN ANIMAL_OUTS O ON I.ANIMAL_ID = O.ANIMAL_ID
WHERE I.ANIMAL_ID IS NULL
ORDER BY O.ANIMAL_ID ASC;