How to make a highscore database for unity?

I have been looking around, but I haven’t found the perfect answer yet. I want to to send scores from unity to a database, without a username. And display the highest scores in the highscore menu. How do I do that? Please explain in detail. Thank you.

@MrTopGamer this url includes everything you need to know about setting up a database, sending and retrieving scores from the database.