I took your code and pulled into my script. However, I was getting an error:

Not an ARRAY reference

I modified the code as follows:
for my $id ( sort keys %{ $hashref1 } ) {
    ## extract an array of results for that key from each hash
    my %results1 = %{ $hashref1->{ $id } };
    my %results2 = %{ $hashref2->{ $id } };
    my %results3 = %{ $hashref3->{ $id } };

    ## join them together with spaces 
    ## and print them along with the key
    printf "%14s :  %s \t%s\t%s\n", $id, 
        join( ' ', %results1 ),
        join( ' ', %results2 ),
        join( ' ', %results3 );
}

[download]

I was then able to get the data back out of the hash but it did not maintain the data order (columns) that I get when running the straight SQL. Perhaps using the selectall_hashref may not be the answer.

If people have other suggestions for options, feel free to pass them along.

In reply to Re^2: Merging Results from 3 different queries by MegaVoice
in thread Merging Results from 3 different queries by MegaVoice

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