Tutorials on architecture

I'm looking for some tutorials (video or text) on basic software architectures. For example, an application with decoupled business logic and presentation logic that reads from and writes to a database. Most of the tutorials I find don't go further beyond basic CRUD operations. I need a more evolved example where business classes have a different shape from the database records. So, a single transaction might affect multiple database relations. I have already checked repository pattern, but that seems quite tightly coupled with the .NET framework (Entity Framework to be exact). Is there any platform agnostic tutorial that covers the concepts I am looking for?