To start your learning of SQL Server and testing of new features, Microsoft provided some of ready to use sample databases. These are very useful for students and new learners.
Microsoft provides 2 sample databases which can be found at: https://docs.microsoft.com/en-us/sql/samples/sql-samples-where-are?view=sql-server-ver15
1) AdventureWorks: One of the oldest sample databases, Microsoft keeps updating it with new versions. Directly available on MS site for download.
2) Wide World Importers: New entry in sample databases and can be downloaded from Github.
When you click on the yellow highlighted link, It will redirect you to Github and you can download backup files from there.
Reference: Rohit Garg (http://mssqlfun.com/)
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