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?
- Dyanmic Data: User settings, custom fields.
- External Payloads: Storing Webhook responses.
Conclusion
Don't treat Postgres like MongoDB. Relational data (Users, Orders) belongs in Tables. dynamic attributes belong in JSONB.