Poor man's join.

Save each worksheet into a hash and use this idiom:

#!/usr/bin/perl -w
use strict;
use Data::Dumper;

my %nobin = (
 0 => '0000',  1 => '0001',  2 => '0010',  3 => '0011',
 4 => '0100',  5 => '0101',  6 => '0110',  7 => '0111',
 8 => '1000',  9 => '1001', 10 => '1010', 11 => '1011',
12 => '1100', 13 => '1101', 14 => '1110', 15 => '1111'
);

my %nohex = (
 1 => '1',  2 => '2',  3 => '3',  8 => '8',
 9 => '9', 10 => 'A', 11 => 'B', 12 => 'C',
13 => 'D', 14 => 'E', 15 => 'F'
);

my %join = map { $_, [$nobin{$_}, $nohex{$_} ] }
           grep { exists $nohex{$_} } keys %nobin;

print Dumper(\%join);

__END__
$VAR1 = {
   '1' => [ '0001', '1' ],
   '2' => [ '0010', '2' ],
   '3' => [ '0011', '3' ],
  '10' => [ '1010', 'A' ],
  '11' => [ '1011', 'B' ],
  '12' => [ '1100', 'C' ],
  '13' => [ '1101', 'D' ],
   '8' => [ '1000', '8' ],
  '14' => [ '1110', 'E' ],
   '9' => [ '1001', '9' ],
  '15' => [ '1111', 'F' ]
};
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A quick look at the DBD::Excel manpage reveals that joins (multi-table selects) are not currently supported.

If your computer has an ODBC-driver to access Excel files, you might be able to use standard SQL join syntax through DBD::ODBC.

I have been able to read in the files using dbd::excel and print it out, but haven't really fidured out the command structure yet.