The table with the foreign key is called the child table, and the table with the primary key is called the referenced or parent table. # Examples to understand FOREIGN KEY Constraints in MySQL. First, ...

MySQL Foreign Keys Add foreign key Add foreign key without locking tables set FOREIGN_KEY_CHECKS =0; ALTER TABLE books ADD CONSTRAINT fk_books_author_id FOREIGN KEY (author_id) REFERENCES authors (id) ...

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Hence, the birth of the MySQL InnoDB vs. MyISAM debate. Of course, MySQL users prior to the 5.5 release were probably perplexed by the assertion that the database didn't support foreign keys. MySQL ...

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