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MYSQL JOINS Join 3 table with the same name of id

Join 3 tables on a column with the same name


CREATE TABLE Table1 (
 id INT UNSIGNED NOT NULL,
 created_on DATE NOT NULL,
 PRIMARY KEY (id)
)
CREATE TABLE Table2 (
 id INT UNSIGNED NOT NULL,
 personName VARCHAR(255) NOT NULL,
 PRIMARY KEY (id)
)
CREATE TABLE Table3 (
 id INT UNSIGNED NOT NULL,
 accountName VARCHAR(255) NOT NULL,
 PRIMARY KEY (id)
)

after creating the tables you could do a select query to get the id's of all three tables that are the same

SELECT
 t1.id AS table1Id,
 t2.id AS table2Id,
 t3.id AS table3Id
FROM Table1 t1
LEFT JOIN Table2 t2 ON t2.id = t1.id
LEFT JOIN Table3 t3 ON t3.id = t1.id


Conclusion

In this page (written and validated by ) you learned about MYSQL JOINS Join 3 table with the same name of id . What's Next? If you are interested in completing MYSQL tutorial, your next topic will be learning about: MYSQL UNION.



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