가입 왼쪽으로 두 개의 테이블 내부에 가입

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SQL 내부에 가입하는 세 가지 테이블

SELECT C.customer_id, C.first_name, O.amount, S.status
FROM Customers AS C
INNER JOIN Orders AS O
ON C.customer_id = O.customer
INNER JOIN Shipping AS S
ON C.customer_id = S.customer_id;
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sql 쿼리 내부 조 3 테이블

# no need to use parentheses - works fine
SELECT * FROM names A
INNER JOIN address B ON A.personID = B.personID
INNER JOIN emailAddress C ON A.personID = C.personID
INNER JOIN phoneNumbers D ON A.personID = D.personID;

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