프로그래머스_없어진 기록 찾기(MySQL)

 

https://programmers.co.kr/learn/courses/30/lessons/59042

코딩테스트 연습 - 없어진 기록 찾기

[코드]

select O.ANIMAL_ID as ANIMAL_ID, O.NAME as 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;

 

select animal_id, name 
    from animal_outs
    where animal_id not in(select animal_id from animal_ins);