Hashes are great tools to weed out duplicates 
my %seen;
while (my $row = $csv->getline($fh)) {
    next if $seen{ $row->[1] }{ $row->[9] }++;

    ...
}

[download]

This is based on code in perlfaq4

In reply to Re: Unique with Text::CSV_XS by ikegami
in thread Unique with Text::CSV_XS by simply seth

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