Category: Database
Relational vs NoSQL
A beginner-friendly, complete guide to relational vs NoSQL databases: what each one really is, how they store and scale data, the CAP theorem, ACID vs BASE, real-world architectures, and a practical decision checklist for picking the right database for your system.
What Is a Primary Key?
A full-length guide to the primary key — history, B-tree internals, natural vs surrogate keys, composite keys, sharding, distributed IDs, security, caching, APIs, Java examples, and real-world lessons from Netflix, Amazon, Uber, Instagram, and Google.
What Is Database Connection Pooling?
A complete, beginner-friendly, production-grade guide to database connection pooling: why opening a fresh database connection for every request is one of the most expensive mistakes in software engineering, and how connection pools quietly fix it inside almost every production system. Covers the full origin story from the 1990s Object Pool…
Why Might an Architect Choose Polyglot Persistence?
A complete, beginner-friendly, production-grade tutorial on polyglot persistence: why modern architects deliberately use many different databases in one system, when it is worth the added operational cost, and how it actually works. Covers the full history from Edgar Codd’s 1970s relational model through the NoSQL movement and the 2011 naming…