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#databases

4 articles

PostgreSQL Indexes Explained: B-Trees and Beyond
databases

PostgreSQL Indexes Explained: B-Trees and Beyond

How Postgres indexes really work — B-tree mechanics, when indexes get ignored, covering, partial, and composite strategies, proven with EXPLAIN.

3 min read
PostgreSQL Query Optimization: The EXPLAIN ANALYZE Workflow
databases

PostgreSQL Query Optimization: The EXPLAIN ANALYZE Workflow

Make slow Postgres queries fast, methodically — read EXPLAIN ANALYZE, spot sequential scans and bad joins, fix estimates, and repeat a checklist.

4 min read
PostgreSQL Transactions and Isolation Levels, Finally Clear
databases

PostgreSQL Transactions and Isolation Levels, Finally Clear

ACID in practice — what transactions guarantee, the four isolation levels as real anomalies, why READ COMMITTED is default, and handling conflicts.

3 min read
SQLite Everywhere: How the Little Database Quietly Won
tech

SQLite Everywhere: How the Little Database Quietly Won

The most deployed database in history runs your phone, browser, and servers — how SQLite's design aged into superpowers, and where it fits.

4 min read