This is from the same org behind that AI generated Zig by Example repo the other day.

Hard pass.

Appears a bit too superficial to me to be useful. It groups topics very weirdly (bool and timestamp, uuid and JSONB) and there is almost no detail in each topic.

Explaining text column types without mentioning limiting length with constraints instead of using varchar also seems a bit questionable to me.

I'd also recommend Tobias Petry's books which feature MySQL and Postgres examples. Really easy to read. https://sqlfordevs.com/books+courses