PostgreSQL: JSONB vs Relational Tables

Postgres allows JSON columns. Should you use them?

The Promise

No migrations! Just dump data!

INSERT INTO events (data) VALUES ('{"event": "click", "x": 10, "y": 20}');

The Trap

If you use JSONB for everything, you lose: * Foreign Keys (Data Integrity). * Efficient types (Date, Int vs String). * Space (JSON keys are stored repeatedly).

When to use JSONB?

1. Dyanmic Data: User settings, custom fields.
2. External Payloads: Storing Webhook responses.

Conclusion

Don't treat Postgres like MongoDB. Relational data (Users, Orders) belongs in Tables. dynamic attributes belong in JSONB.