Comparison Oracle, PostgreSQL and MySQL
A research team of the Alice project from the Dutch Institute for Nuclear and High Engery Physics (NIKHEF) wrote a very elaborate comparison on Oracle, PostgreSQL and MySQL. This document can be found here. At the end of the page there is a table with a very nice summary of (the support of) the main features.
The link in your post is not correct (anymore): 404 (of course the server could be down but I am not sure how permanent that might be)