The DBI Module
Using Perl, as with Php or Java, we can access Oracle or 
MySQL databases. We will use MySQL.

Perl uses the module DBI to access databases and write applications. 
DBI stands for Database independent interface It work as an 
interface between the perl script and the databases (MySQL, Oracle 
or Informix).
This module sets methods and variables ragarding the SQL commands 
from Perl via an API (Application Programming Interface).

If this module doesn't come with the installed Perl, just 
download it from CPAN.org, 
including its driver DBD::mysql. We can check the installation 
by performing the following uder the command line:
C:> ppm
(ppm remove "Module", ppm install "Module" can be also used).