Maybe this is obvious, but the PostgreSQL manual [1] is excellent. The first 100 or so pages (at least up to and including chapter 7) will give you a good overv

Maybe this is obvious, but the PostgreSQL manual [1] is excellent. The first 100 or so pages (at least up to and including chapter 7) will give you a good overview. I suggest you read through them at least once. Then you can dig into the rest of that manual at leisure, exploring topics that interest you. It's a great reference too. [1] https://www.postgresql.org/docs/manuals/ https://www.postgresql.org/docs/manuals/