To add the sample db: (src: https://github.com/Microsoft/sql-server-samples/tree/master/samples/databases/adventure-works)

1. Extract the zip file SQLScripts\AdventureWorks-oltp-install-script.zip to the C:\Samples\AdventureWorks folder.
2. Open C:\Samples\AdventureWorks\instawdb.sql in SQL Server Management Studio and follow the instructions at the top of the file.