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Re:Ask HN: PostgreSQL resources for SQL Server users? by vog on Tuesday December 07, 2021 @04:43PM (#29478587)
I'd recommend starting "from scratch" for the simple reason that the official PostgreSQL manual is excellent:

https://www.postgresql.org/docs/14/index.html

You'll quickly find which parts of the manual are interesting to you and which ones just repeat what you already know (or could have guessed on your own). Since the manual is very well structured, skipping those parts is very easy.

Re:Ask HN: PostgreSQL resources for SQL Server users? by JeffRosenberg on Tuesday December 07, 2021 @04:59PM (#29478739)
Look at that, there's an entire section on internals. Honestly, I didn't even consider looking there, I just assumed it would be all about syntax and never bothered to check. Thanks!
Re:Ask HN: PostgreSQL resources for SQL Server users? by Tostino on Saturday December 11, 2021 @02:07AM (#29519121)
The Postgres docs are great because of that. They are kept on top of pretty regularly compared to most open source projects, and document things in an understandable way.