SQL 왼쪽 안티조인

(왼쪽 안티 조인에서 넘어옴)

1 개요[ | ]

SQL left anti join
SQL 왼쪽 안티 조인

2 예시: Sales & Countries[ | ]

Left-anti-join-operation.png

CREATE TABLE Sales (Date date, CountryID int(11), Units int(11));
INSERT INTO Sales (Date, CountryID, Units) VALUES
	('2020-01-01', 1, 40),
	('2020-01-02', 1, 25),
	('2020-01-03', 3, 30),
	('2020-01-04', 2, 35);

CREATE TABLE Countries (ID int(11), Country varchar(16));
INSERT INTO Countries (ID, Country) VALUES
	(3, 'Panama'),
	(4, 'Spain');

SELECT * FROM Sales
WHERE CountryID NOT IN ( SELECT ID FROM Countries );

3 같이 보기[ | ]

4 참고[ | ]

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