What needs more documentation is the highlighting of sections where Postgres does differently from say, Oracle, MySQL or SqlServer...
e.g., If you are used to do X this way with MySQL, here's how to do it in Postgres.
e.g., If you are used to do X this way with MySQL, here's how to do it in Postgres.
I've been collecting links from this thread for my own personal learning so thought I'd throw in the only one I came here with.