14. Triggers

Triggers execute automatically before or after DML events and are useful for enforcing invariant checks and audit records.

Lessons

• Trigger Fundamentals
• Audit and Validation Triggers

Trigger Event Table

Timing	Event	Typical use
BEFORE	INSERT, UPDATE, DELETE	Validate or normalize input
AFTER	INSERT, UPDATE, DELETE	Audit logging and downstream side effects

What's Next

• Continue to 15. Event Scheduler