Website database selection guide: MySQL, PostgreSQL, SQLite, NoSQL comparison
Database is a core component of website architecture. Choosing right saves significant migration and optimization costs later.
Comparison
| DB | Type | Best for | Complexity |
|---|---|---|---|
| MySQL | Relational | CMS, e-commerce, traditional web | Low |
| PostgreSQL | Relational | Complex queries, GIS, finance | Medium |
| SQLite | Embedded | Small sites, mobile, embedded | Zero |
| MongoDB | Document NoSQL | Content mgmt, logs, IoT | Medium |
| Redis | Key-value | Sessions, cache, queues | Low |
MySQL
Most widely used database for websites. Deep integration with WordPress, Drupal, Magento.
Key: Mature ecosystem, strong replication, affordable managed services.
PostgreSQL
Most advanced SQL features (window functions, CTEs, recursive queries). Strong extension system with PostGIS (geospatial) and pgvector (AI vectors).
Recommended default for most new projects.
SQLite
World's most deployed database engine. Serverless, zero configuration. Not suitable for high-concurrency writes or datasets >1TB.
Selection guide
- CMS (WordPress/Drupal) → MySQL/MariaDB
- Analytics/GIS needs → PostgreSQL
- Small site/prototype → SQLite (migrate later)
- Flexible data model → MongoDB
- High-speed cache → Redis + relational DB
- AI vectors → PostgreSQL + pgvector
16IDC Takeaway
For most web projects, the recommended default is PostgreSQL. It offers the best balance of features, performance, and scalability. For the vast majority of website workloads, query optimization and indexing matter far more than database choice.
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