Part of LAMP. One of the most powerful SQL servers out there is called MySQL and surprisingly enough, its free. Yes, free. I now use this instead of MS Access, Filemaker or FoxPro (lol). However, since Oracle is now the owner of MySQL, there is a fork of MySQL now gaining popularity called MariaDB which want to keep the project as open as possible.
Some of the features of MySQL Include: Handles large databases, in the area of 50,000,000+ records. No memory leaks. Tested with a commercial memory leakage detector (purify). A privilege and password system which is very flexible and secure, and which allows host-based verification.
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