What's the Differences Between Relational, NoSQL, Vectors, and Caches
Updated: September 17, 2026
Your app still has one job: store data, fetch it fast, and stay honest about "correct." The modern "database" is a stack-primary store, a few specialists, plus cache-so you don't melt your main DB. This post walks through Postgres, MySQL, Mongo, vectors, and Redis, then lands on a boring 2026 default for most SaaS: Postgres + JSONB + pgvector + Redis. read on »