Database Management Patterns

This is your reference guide when you need to make informed decisions between PostgreSQL and MongoDB, or when you're optimizing either one in production. It covers the practical stuff: normalization strategies and when to break them, foreign key cascade patterns, indexing approaches for both relational and document models, transaction isolation levels, and sharding configurations. The CAP theorem comparison is honest about tradeoffs rather than dogmatic. What I appreciate here is the side-by-side treatment of SQL and NoSQL patterns, so you're not just learning one paradigm in isolation. Most useful when you're past the tutorial phase and dealing with real schema design decisions or performance bottlenecks.