How to use the keyword 'references' in MySQL?

Question

How is the references keyword used when creating a table?

Let\'s say I want to create two tables person and hobby and I want t

Answer 1

Here is an example directly from MySQL website:

CREATE TABLE parent (id INT NOT NULL,
                     PRIMARY KEY (id)
) ENGINE=INNODB;

CREATE TABLE child (id INT, parent_id INT,
                    INDEX par_ind (parent_id),
                    FOREIGN KEY (parent_id) REFERENCES parent(id)
                    ON DELETE CASCADE
) ENGINE=INNODB;