for(my $iR = $oWkS->{MinRow} ;
                defined $oWkS->{MaxRow} && $iR <= $oWkS->{MaxRow} ; $iR++) {
            for(my $iC = $oWkS->{MinCol} ;
                            defined $oWkS->{MaxCol} && $iC <= $oWkS->{MaxCol} ; $iC++) {
                $oWkC = $oWkS->{Cells}[$iR][$iC];
                print "( $iR , $iC ) =>", $oWkC->Value, "\n" if($oWkC);
            }
        }
    }
# This helps make sure we're using the vars we mean to use
use strict;

# use DBI;                               # you'll need to add the dbi / oracle info?

my $oldrow = 0;
my @field_names = qw(fieldname_one fieldname_two fieldname_three);
my (@fields,@values);

# my $dbh = DBI->connect(...,...,...);
# my $sth;

open DATA, "< $oWkS" or die "$oWkS: $!\n";