Cascading Updates and Deletes in SQL

Cascading Updates and Deletes in SQL — a practical guide to SQL ON DELETE CASCADE with clear examples you can reuse in real projects.

SQL Tutorial Series (83/100). Prefer one article? Read the complete SQL tutorial.

Short description

CASCADE is powerful — prefer RESTRICT/SET NULL when deletes should be intentional.

Cascade example

FOREIGN KEY (user_id) REFERENCES users(id)
  ON DELETE CASCADE
  ON UPDATE CASCADE