[MySQL] IN, NOT IN

예를 들어 ANIMAL_INS 테이블이 다음과 같다면

ANIMAL_ID	ANIMAL_TYPE	DATETIME	INTAKE_CONDITION	NAME	SEX_UPON_INTAKE
A365172	Dog	2014-08-26 12:53:00	Normal	Diablo	Neutered Male
A367012	Dog	2015-09-16 09:06:00	Sick	Miller	Neutered Male
A365302	Dog	2017-01-08 16:34:00	Aged	Minnie	Spayed Female
A381217	Dog	2017-07-08 09:41:00	Sick	Cherokee	Neutered Male

 

INTAKE_CONDITION 이 Sick인 동물 검색

 

 

where intake_condition = "Sick" 로 검색할 수 도있지만

 

IN 사용

select animal_id, name
from animal_ins
where intake_condition in ("Sick")
order by animal_id asc;

 

NOT IN 사용

select animal_id, name
from animal_ins
where intake_condition not in (select intake_condition from animal_ins where intake_condition != "Sick")
order by animal_id asc;