#!/usr/bin/perl
use strict;
use warnings;
use Data::Dumper;
use Spreadsheet::Read;

my $book = ReadData("test.xlsx");
my $sheet = $book->[1]; # first data sheet
my @column = $sheet->{cell}[2]; # 2nd column, unformatted
print Dumper \@column;

__END__

$ perl test.pl
$VAR1 = [
          [
            undef,
            'BB1',
            undef,
            101,
            202,
            303,
            404,
            505,
            606,
            707,
            808,
            909
          ]
        ];