SQL Project 1: Fraud Detection Using Triggers
Courses

This project is a complete, end-to-end SQL system design workshop where you build an enterprise-grade fraud detection system from scratch using PostgreSQL.


Instead of writing simple queries or CRUD operations, this project teaches you how real banks and fintech platforms enforce fraud controls at the database level using triggers, functions, and event-driven patterns.


Through a this 5 hr project, you will:

  1. Understand SQL triggers from fundamentals to advanced usage
  2. Design banking-style schemas for customers, accounts, and transactions
  3. Implement fraud rules that block, detect, and respond to risky behavior
  4. Build an event-driven notification pipeline
  5. Set up a monitoring dashboard to visualize fraud alerts and frozen accounts


This project mirrors real production architectures used in financial systems and is ideal for serious SQL learners preparing for interviews or backend roles.


Course Content


  1. Foundations of Trigger-Based Fraud Detection
  2. Understanding SQL triggers, database enforcement, and project setup
  3. Implementing Basic Fraud Rules Using Triggers
  4. Blocking invalid transaction amounts at the database level
  5. Enforcing Daily Transaction Limits
  6. Cumulative transaction checks using SQL functions and triggers
  7. Automatic Account Freezing Based on Risk Scores
  8. Risk-driven enforcement and account state management
  9. Event-Driven Notifications for Velocity Fraud
  10. Detecting high-velocity behavior and emitting fraud alerts
  11. Notifications for Account Auto-Freeze Events
  12. Emitting enforcement events for downstream systems
  13. Setting Up the Monitoring Dashboard & Environment
  14. Running the dashboard, configuring environment variables, and visualizing fraud data


What are people saying

I attended the session for the first time today and found it extremely valuable. The speaker stayed late to ensure all our queries were addressed, which truly reflected their dedication and commitment. I really appreciate the effort put into making the session informative and engaging. Definitely looking forward to attending future sessions.
Jitesh Tawar
Dec 2025
It was a great session and I must say that your way of teaching is very uniques and very detailed. Thanks a lot.
Ankit Bhargav
Aug 2025
The in-depth knowledge with clarity to handle from basics to advanced concepts through projects and explanation. Thanks for extra ordinary sessions.
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Aug 2025
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Jun 2025
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Feb 2025
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