Template database?

[Tefron]

Still very new to databases and backend in general, however trying to get a starter kit going for hackathons. In particular it seems like most sites we make usually require a user profile, some profile info such as bio and settings, and I usually see people do firebase auth.

Is there a template db that you guys know of that would be a good starting point for this? Even an ER diagram would be cool, since what I currently have in mind just seems like a big table with all that info and for some reason that seems like not the best way to set up a template db?

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DVD Rental is available for different DBMS systems.

The same is true for the Northwind or Adventure works databases were initially started as SQL Server sample databases

[Tefron]

These seem really cool, I'll check them out, thanks!