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Databases & APIs

Store, retrieve, and serve data — the backbone of every web application.

Learning Objectives​

  • Design and normalize relational database schemas
  • Write SQL queries for CRUD operations and reporting
  • Build and consume RESTful APIs
  • Implement authentication and authorization

Key Topics​

Database Design​

Plan your tables, relationships, and indexes. Understand normalization and when to denormalize for performance.

SQL​

Write queries that go beyond basic SELECT. Joins, aggregations, subqueries, and transactions.

API Design​

Design intuitive, consistent APIs. Use proper HTTP methods, status codes, and response formats.

Security​

Protect against SQL injection, implement proper authentication (JWT, sessions), and follow the principle of least privilege.

Exercise​

Design and implement a database schema for an e-commerce application. Build an API that supports product listing, cart management, and order placement.