MYSQL is now Sun's SQL

Facts about MySQL:

• Sun paid $1 billion for MySql which has only $70 million in annual sales (Source: SqlMag.com).
• MySQL is the "M" in LAMP - the software platform comprised of Linux, Apache, MySQL and PHP/Perl.
• MySQL is headquartered in Cupertino, CA and Uppsala, Sweden and has 400 employees in 25 countries.
• MySQL's open source database can be deployed across multiple operating systems & hardware vendors.
• MySQL is used by Yahoo!, Alcatel-Lucent, Google, Nokia, YouTube, Facebook and Slashdot among others.
• MySQL is pretty feature complete when compared to SQL Server but lacks the rich business intelligence (BI) stack that SQL Server offers, integrated reporting & an integrated ETL tool.

Related links:
List of Open-source software & proprietary freeware RDBMSs