[프로그래머스] 우유와 요거트가 담긴 장바구니 mysql (*)

출처: 프로그래머스

https://programmers.co.kr/learn/courses/30/lessons/62284

코딩테스트 연습 - 우유와 요거트가 담긴 장바구니

 

1) join 사용

SELECT A.CART_ID 
FROM CART_PRODUCTS AS A
INNER JOIN CART_PRODUCTS AS B
ON A.CART_ID = B.CART_ID
WHERE A.NAME = 'Milk' AND B.NAME = 'Yogurt'
ORDER BY A.ID;

2) 서브쿼리

SELECT CART_ID
FROM CART_PRODUCTS
WHERE CART_ID IN (
    SELECT CART_ID
    FROM CART_PRODUCTS
    WHERE NAME = 'Milk'
)
AND NAME = 'Yogurt'
ORDER BY ID;

3) 서브쿼리 2

SELECT DISTINCT(CART_ID) AS CART_ID
FROM CART_PRODUCTS
WHERE CART_ID IN (
    SELECT CART_ID
    FROM CART_PRODUCTS
    WHERE NAME = 'Milk'
)
AND CART_ID IN (
    SELECT CART_ID
    FROM CART_PRODUCTS
    WHERE NAME = 'Yogurt'
)
ORDER BY ID;