Hello everybody!

I'm thinking of experimenting with a more powerful RDBMS than MySQL. I just want to play with some more advanced features and am not really looking for anything that will go into production (yet ). I am thinking of PostgreSQL, but I'll need to put Linux back onto my computer first (yes I have run it under Cygwin, but it's not much good this way!). I am also thinking of Sybase. I have a few requirements:

1) It needs to be FREE, or a free learning or dev version of a commercial product

2) I want to be able to connect to it with PHP

3) Something that will run on Windows XP would be good

4) Support for triggers and stored procedures

Any suggestions?