JOIN(7种JOIN)

• INNER JOIN

SELECT FROM TBL1 INNER JOIN TBL2 ON TBL1.KEY = TBL2.KEY

• LEFT JOIN

SELECT FROM TBL1 LEFT JOIN TBL2 ON TBL1.KEY = TBL2.KEY

• LEFT JOIN(排除交集)

SELECT FROM TBL1 JOIN TBL2 ON TBL1.KEY = TBL2.KEY WHERE TBL2.KEY IS NULL

• RIGET JOIN

SELECT FROM TBL1 RIGHT JOIN TBL2 ON TBL1.KEY = TBL2.KEY

• RIGHT JOIN(排除交集)

SELECT FROM TBL1 RIGHT JOIN TBL2 ON TBL1.KEY =TBL2.KEY WHERE TBL1.KEY IS NULL

• FULL OUTER JOIN

SELECT FROM TBL1 FULL OUTER JOIN TBL2 ON TBL1.KEY = TBL2.KEY

• FULL OUTER JOIN(排除交集)

SELECT FROM TBL1 FULL OUTER JOIN TBL2 ON TBL1.KEY = TBL2.KEY WHERE TBL1.KEY IS NULL AND TBL2.KEY IS NULL;

标签：FULL,JOIN,TBL2,KEY,TBL1,SELECT
来源： https://www.cnblogs.com/new228666/p/16463661.html