Here's something that I think does what you want. I'm sure all this can be done in place of that %sorted_by_attribute hash, but I'd need to look over the code some more to figure it out. Anyway, just replace your "print" loop with the following, then loop through %newhash to get at your data: 
my %newhash;
foreach my $attribute (sort keys %sorted_by_attribute) {
  my $individual_values = $sorted_by_attribute{$attribute};
  
  foreach my $value (keys %$individual_values) {
    my @systems = @{$sorted_by_attribute{$attribute}{$value}};
    
    foreach $system (@systems) {
      my $key = $HoH{$system}{'Group'};
      my $str = sprintf "%s = > %s\n", $HoH{$system}{'System Name'}, $
+value;
      push @{ $newhash{$attribute}{$key} }, $str;
    }
  }
}  

print Dumper (\%newhash);

[download]
I'm sure the $key and $str variables can be done away with and those expressions put directly into the push statement, but it would be rather ugly. Anyway, I hope this does what you want.

--

There are 10 kinds of people -- those that understand binary, and those that don't.

In reply to Re: Reports using perl by mephit
in thread Reports using perl by data67

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.