[Programmers] 019 - 오랜 기간 보호한 동물(2)

SELECT B.ANIMAL_ID
     , B.NAME
  FROM ANIMAL_INS A
  LEFT JOIN ANIMAL_OUTS B ON A.ANIMAL_ID = B.ANIMAL_ID
 WHERE 1 = 1
   AND B.ANIMAL_ID IS NOT NULL
 ORDER BY DATEDIFF(B.DATETIME, A.DATETIME) DESC
 LIMIT 2