Programmers -> Summer/Winter Coding(2019)
SELECT A.CART_ID FROM
(SELECT CART_ID FROM CART_PRODUCTS WHERE NAME = 'Milk') AS A JOIN
(SELECT CART_ID FROM CART_PRODUCTS WHERE NAME = 'Yogurt') AS B
ON A.CART_ID = B.CART_ID;
❗ JOIN 할 때 ON으로 묶어줄 칼럼 정하는거 잊지말기 ❗
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