MySQL is the world’s most popular Open Source database engine.

Features include complete ACID (atomic, consistent, isolated, durable) transaction support, unlimited row-level locking, distributed transaction capability, and multi-version transaction support where readers never block writers and vice-versa. Full data integrity is also assured through server-enforced referential integrity, specialized transaction isolation levels, and instant deadlock detection.

“The platforms powering the Web today are the enterprise infrastructure of tomorrow. What we learn from those platforms is the enormous power of open source, open standards, and user involvement… and one more thing — that the future belongs to data. Every killer app on the Internet is a database application. And that makes MySQL the ‘Intel Inside’ of the next-generation of computer applications.”

— Tim O’Reilly, Founder and CEO of O’Reilly Media