🔗 https://school.programmers.co.kr/learn/courses/30/lessons/59042
SELECT O.ANIMAL_ID, O.NAME
FROM ANIMAL_OUTS O
LEFT JOIN ANIMAL_INS I ON O.ANIMAL_ID = I.ANIMAL_ID
WHERE I.ANIMAL_ID IS NULL
ORDER BY O.ANIMAL_ID🔗 https://school.programmers.co.kr/learn/courses/30/lessons/59042
SELECT O.ANIMAL_ID, O.NAME
FROM ANIMAL_OUTS O
LEFT JOIN ANIMAL_INS I ON O.ANIMAL_ID = I.ANIMAL_ID
WHERE I.ANIMAL_ID IS NULL
ORDER BY O.ANIMAL_ID