Just traverse your entire set of tuples, keeping track of all values of feature and/or plan. Then traverse each feature, and each plan, and output either the value you stored, or a useful default. (If you have a truly vast number of features and/or plans, it might be worthwhile to do two passes so you don't have to keep all of them in memory at once, but that seems unlikely...) 

my %features;
my %plans;
my %feat_plan_val;
while ( my ( $feat_id, $feat_name,
             $plan_id, $plan_name,
             $val ) = $sth->fetchrow_array() )
{
    $features{$feat_id} = $feature_name;
    $plans{$plan_id} = $plan_name;
    $feat_plan_val{$feat_id}{$plan_id} = $val;
}

# later...

my @plan_ids = sort keys %plans;
print join( "\t", 'Features', @plans{@plan_ids} ), "\n";
foreach my $feat_id ( sort keys %features )
{
    my @vals = ( $features{$feat_id} );
    foreach my $plan_id ( @plan_ids )
    {
        my $val = $feat_plan_val{$feat_id}{$plan_id};
        push @vals, ( defined $val ? $val : '-' );
    }
    print join( "\t", @vals ), "\n";
}

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In reply to Re: Creation Suggestion needed... please by tkil
in thread Creation Suggestion needed... please by ukndoit

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