Where can I see examples of DB architectures/relations?

Question

Database design

Good day.

Is there any service / site / blog, etc. in which examples (in the form of a picture of links or SQL code or something else) of databases are presented?
Well, maybe with an explanation of why such connections were created, and not otherwise.

Answer 1

https://drawsql.app/templates

Collection of real world database schemas from open-source packages and real-world apps that you can use as inspiration when architecting your app.

For every taste.

Answer 2

Search by keyword IDEF1X. There are a lot of results with explanations and examples, including in Russian. Not everything can be listed here.