Creating a foreign key relationship between two tables in a MySQL database using Python is a relatively straightforward process. The following example code will create a foreign key relationship ...

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Note that the "P_Id" column in the "Orders" table points to the "P_Id" column in the "Persons" table. In MySQL, the FOREIGN KEY on one table is used to point a PRIMARY KEY in another table. We have ...

CREATE TABLE folders ( id INT NOT NULL DEFAULT 0, name VARCHAR(255), parentid INT, PRIMARY KEY (id), FOREIGN KEY (parentid) REFERENCES folders(id) ON DELETE CASCADE ) ENGINE=InnoDB; More options ...