Expands to a ~50GB database called StackOverflow2013 with data from 2008 to 2013 data. Medium: 50GB database as of 2013: 10GB direct download, or torrent or magnet.If all you need is a quick, easy, friendly database for demos, and to follow along with code samples here on the blog, this is all you probably need. Expands to a ~10GB database called StackOverflow2010 with data from the years 2008 to 2010. Small: 10GB database as of 2010: 1GB direct download, or torrent or magnet.Plus, it’s open source and no charge for you – just choose your size: It’s easy to learn, has just a few easy-to-understand tables, and has real-world data distributions for numbers, dates, and strings. I use a Microsoft SQL Server version of the public Stack Overflow data export for my blog posts and training classes because it’s way more interesting than a lot of sample data sets out there.