Your code says, that you are german. I have some links, that migth be interesting for you:

http://wiki.perl-community.de/bin/view/Wissensbasis/UseStrict It's a description, why use strict is useful.

And in http://wiki.perl-community.de/bin/view/Wissensbasis/CSVtoXML you can see how to use the DBI and the DBD::CSV-module, which is very useful if you work with CSV-files.