PostgreSQL vs MySQL vs MongoDB
Databases: relational vs document, and which one fits your actual data model.
When to Use This Comparison
Reference this when choosing databases for new projects, migrating from legacy systems, scaling beyond SQLite, or when current database feels like wrong fit. Critical when data model and query patterns are becoming clear.
Decision Context
Your ideal database depends on data model fit, query patterns, scale requirements, team expertise, and whether you're optimizing for flexibility or consistency. CRUD apps have different needs than analytics or real-time systems.
Key Tradeoffs
PostgreSQL offers powerful features and reliability but requires careful schema design. MySQL provides simplicity and speed but fewer advanced features. MongoDB enables flexible schemas but sacrifices consistency guarantees and can surprise you at scale.