I've seen many examples of database schemas but don't always recognise a good design over a mediocre or poor design.
This is what I mean by schema (is this a good design?)
https://www.drupal.org/node/1785994
When I read about database schemas with thousands of tables I wonder what kind of problem could possibly require so many tables.
What are good schema examples? And what are some poor examples?
I think 'learning from how not to do something' is a really powerful pedagogical technique that should be more widespread.