More advanced tutorials - such as Angular: How To Build Annual Leave Scheduling Application (ASP.NET Core Backend) - show how to use the Scheduler in a real-world application.
Most of the tutorial use Entity Framework to handle the data access. The Entity Framework lets you create the database schema from the model classes. It can also help with generating the MVC controllers with REST API. The tutorials use generated migrations to creates and initialize the SQL Server database using LocalDB.
Older tutorials for ASP.NET MVC 3/4/5 are also available.