title: Understanding MySQL licensing
body: <p>I'm trying to figure out if I require a MySQL commercial license. After reading from their site, it was still confusing to me. I have a phone call set up with them tomorrow, but I want the community's knowledge as well.</p>
  <p>I'm creating an ERP desktop application for my company. We will probably end up using the .NET framework to produce it since we are all using Windows machines. This software will be used internally with up to 50 users (13 right now).</p>
  <p>Question:</p>
  <p><strong>If I were to open source the project (put it on GitHub), can I use the free version of MySQL?</strong></p>
  <p>If not, we probably would just stick to our original plan and purchase SQL Server ($8,000, ouch) since it appears the commercial license for MySQL is $5,000.</p>
  <p>I don't have any experience with PostgreSQL, would you recommend that or another database that are completely free to use, and able to work in a production environment?</p>