#!/usr/bin/env perl

use strict;
use warnings;
use autodie;

use Text::CSV;

my $infile = 'pm_11140211_flatfile.dat';
my $csv = Text::CSV::->new({sep_char => '|'});

open my $in_fh, '<', $infile;
my $row = {};
my @cols = @{$csv->getline($in_fh)};
$csv->bind_columns(\@{$row}{@cols});
my %data = map +($_, {}), @cols;

while ($csv->getline($in_fh)) {
    $data{$_} = { %{$data{$_}}, $row->{$_}, 1 } for @cols;
}

print "$_: ", join(', ', sort keys %{$data{$_}}), "\n" for sort @cols;