postgresql 27
- Why Your SQL Query Is Slow — 12 Common Causes
- Window Functions in SQL — The Feature That Separates Juniors from Seniors
- Database Transactions and Isolation Levels — Explained with Race Conditions
- How to Read a Query Execution Plan (EXPLAIN ANALYZE Deep Dive)
- Optimistic vs Pessimistic Locking in SQL (With Real Deadlock Examples)
- NULL in SQL — The Silent Bug in Half Your Queries
- SQL Joins Explained Visually — INNER, LEFT, RIGHT, FULL, and the Ones You've Never Used
- The Complete SQL Interview Preparation Guide (2026)
- GROUP BY, HAVING, and Aggregations — The Complete Mental Model
- CTEs vs Subqueries vs Temp Tables — When to Use Which (With Benchmarks)
- SQL Anti-Patterns — 10 Mistakes That Will Get You Rejected in Code Review
- Read Replicas, Connection Pooling, and Scaling SQL to Millions of Users
- PostgreSQL vs MySQL in 2026 — An Honest Comparison
- JSON in SQL — Using PostgreSQL JSONB Like a Pro
- I Optimized a Query from 45 Seconds to 200ms — Here's How
- The N+1 Query Problem — And 4 Ways to Kill It
- Database Sharding Strategies — Range, Hash, and Directory-Based
- How I Design Database Schemas That Scale — Normalization, Denormalization, and When to Break the Rules
- Database Indexing Explained — B-Trees, When to Index, and When It Hurts
- ACID vs BASE — What Every Backend Developer Gets Wrong
- System Design — URL Shortener with Spring Boot
- Spring Data JPA — Beyond the Basics (Projections, Specifications, Auditing)
- Spring Boot + Testcontainers — Integration Testing Done Right
- Outbox Pattern with Spring Boot + Kafka — Guaranteed Event Publishing
- Spring Boot + Flyway — Database Migrations That Don't Break Production
- CQRS + Event Sourcing with Spring Boot
- Docker Compose for Local Development — A Spring Developer's Guide