For SQL, check out http://www.sqlcourse.com/. As for tutorials with PG.pm, all I can find seem to be in Italian. Unless you speak it, that's probably not terribly useful.

Why do you say that PG.pm is "the only thing that works on [your] machine"? Why doesn't DBI work? And is it really the case that nothing else works on your machine? How have you verified this? If you're going to work with PG.pm and you're not terribly familiar with Perl (as your post suggest to me), then you're going to have to face the fact that lesser-known technologies are going to be more difficult to get assistance with. Taking the time to figure out how to get DBI to work will reap great benefits in the long run. More people can help you and if you need to switch databases, it's a snap.

You can learn more about DBI with this short introduction.

Cheers,
Ovid

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