Just to clearify what has been said and give you a little more to work with. Go to www.activestate.com and download MSI.exe and active perl. MSI is the M$ installer. After you download these files run the MSI.exe (downloadable at activestate)and you will have to restart your pc. Then you can double click on the activestate file it will end in .msi. You will again have to restart your pc. Next open a command window and run the command ppm from here you can use  search DBI or you can just run

install DBI
[download]

DBI is your focal point for database access. This contains ADO by default. Then to add Oracle run

 
install DBD::Oracle
[download]

This will install the database driver for Oracle.

Happy Coding

--BigJoe

Learn patience, you must.
Young PerlMonk, craves Not these things.
Use the source Luke.