But if you use it for something important to you, you may want to support further development of MySQL by purchasing a support license. The MySQL server license . MySQL may be used freely, including by commercial entities for evaluation or unsupported internal use. However, distribution for commercial purposes of MySQL , or anything containing or derived from MySQL in whole or in part, requires a written commercial license from TcX AB, the sole entity authorised to grant such licenses. If you want to distribute software in a commercial context that incorporates MySQL and you do not want to meet these conditions, you should contact TcX AB to find out about commercial licensing.
Commercial licenses involve a payment, and include support and other benefits.
I want to sell a product that can be configured to use MySQL . If MySQL just added some new features it should fall inside normal use. For example, if using MySQL added logging to a database instead of a text file it would not require a license. This would, of course, mean that the user has to fetch and install MySQL by himself. I am running a commercial web server using MySQL .