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 the hobby table id to reference the id of person?

person table
- id
- name

hobby
- id
- person_id
- hobby_name

How do I do that?

Answer 1

Create the hobby table similarly to this:

CREATE TABLE hobby (
  id INT NOT NULL AUTO_INCREMENT,
  person_id INT NOT NULL,
  hobby_name VARCHAR(255),
  PRIMARY KEY(id),
  FOREIGN KEY(person_id) REFERENCES person(id))