The Database Changed Before the Deployment Finished
A schema migration and an application deployment do not happen at one instant. Zero-downtime changes work when old code, new code, and the database are allowed to coexist for a while.
9 min read
SQL for Frontend Engineers: Model the Relationship First
SQL becomes much easier when you stop thinking in tables and start thinking in facts that must remain true. A checkout model shows where keys, JOINs, transactions, and indexes actually earn their place.
9 min read