I'm writing some commercial applications in perl (I write anyting in perl...).

I use the MySql database, availible from http://www.mysql.com for u*x and windows platforms, apache with mod_perl and a SSL enabled apache as well.

I suggest you take a good look at the perl docs for the CGI and DBI modules, and the documentation for the database engine you use.

There is a VERY good book about apache/mod_perl from o'reilly: "Writing Apache Modules with Perl and C" by Stein & McEachern.

-Anders