Why hasn’t anyone done this before? Here is a bak file for the northwind database taken from SQL 2012. Northwind is great for playing around with since it already has data. AdventureWorks is another. I like to have them both on test servers. Anywho, if you want a very simple method of getting northwind onto your SQL 2012 server then just download the bak file and restore it to your server.
Look at all that data!