Databases & Storage
Every application needs to store data somewhere. The decisions you make about where and how have massive implications for performance, cost, and reliability.
This section is a work in progress. Content is being actively developed.
Topics to Be Covered
- SQL vs NoSQL — when to use which
- Relational databases (PostgreSQL, MySQL, SQLite)
- Document databases (MongoDB, Firestore)
- Key-value stores (Redis, DynamoDB)
- Database design and data modeling
- Writing queries (SQL basics)
- Indexes and query performance
- Migrations and schema evolution
- ORMs vs raw queries
- Connection pooling and management
- Backups and data durability
- File and blob storage (S3, cloud storage)
- Caching strategies