Well Both Mysql and Postgresql are great databases for the use of local and remote servers thats no problem at all.
if your hosting a webpage to the outside world i always recomended both of them on a local server and local port to shut down the outside world port connecting to it.
But theres also SQLITE database also great for local fullly grown database stored in one file,
thats why i request sqlite to the wishlist of cqrlog.
73's PD1SR, Roel