[Level 3] 없어진 기록 찾기

SELECT ANIMAL_OUTS.ANIMAL_ID, ANIMAL_OUTS.NAME
FROM ANIMAL_OUTS LEFT OUTER JOIN ANIMAL_INS ON ANIMAL_OUTS.ANIMAL_ID = ANIMAL_INS.ANIMAL_ID
WHERE ANIMAL_INS.ANIMAL_ID IS NULL
ORDER BY ANIMAL_OUTS.ANIMAL_ID