This article was originally published on AI Study Room . For the full version with working code examples and related articles, visit the original post. PostgreSQL vs MySQL vs SQLite (2026): Which Database Should You Use? Choosing a database is one of the hardest decisions to reverse. PostgreSQL, MySQL, and SQLite are the three most popular relational databases — but they're optimized for very different use cases. Here's which one matches your project. Quick Comparison PostgreSQL MySQL SQLite Type Object-relational database Relational database Best for Complex apps, data integrity Web apps, read-heavy workloads Concurrency MVCC (excellent) MVCC (good) Data types JSONB, arrays, geospatial, custom Standard + JSON Full-text search Built-in (excellent) Built-in (basic) Extensions Rich (PostGIS, pgvector, etc.) Limited Replication Streaming, logical Group, semi-sync Scaling Vertical + read replicas Vertical + read replicas Setup Separate server Separate server License PostgreSQL License GPL (Oracle) PostgreSQL —…