The two predominant forms of open source licenses are BSD and GPL. PostgreSQL is licensed under the BSD license , while MySQL is licensed under GPL . While the details are arcane, the business impact is significant, and that is what this post addresses.
The BSD (or BSD-style) License: This license basically says: ‘This code is provided as is, do what you want with it, and include this copyright in your resulting product.’
The GPL License: This license, also known as the copyleft license, essentially says: ‘This is free and distributed as source code, and any addition or extension must also be distributed under these exact terms.’
BSD essentially says I prefer open source code, so I’m making my source code open and freely available, but what you do with it …[Read more]