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?

Sean