You can try looking through various wings of the Monastery where people post code, to see what's sitting around: an example Super Search query

That. combined with the info in previous replies (esp. the part about constructing the parameters for the DBI->connect() call), should get you to the point where you can try something out. If you have trouble, post what you've tried (but don't expose actual connection data, of course, or else your database is likely to be raided/abused).