You can get all the records at once with $dbh->selectall_arrayref($query) and then rotate the resulting matrix.
Tested code ahead.
#!/usr/bin/perl -w
use DBI;
use strict;

my $dbh = DBI->connect("DBI:mysql:test;host=localhost"
        . ";mysql_read_default_file=$ENV{HOME}/.my.cnf",
        undef, undef, {RaiseError => 1})
        or die "can't connect\n";

my $query = qq{SELECT * from testgraph};
my $result = $dbh->selectall_arrayref($query);

print "straight\n";
my @rotated =();
for my $row (@$result) {
    print "@$row\n";
    for (0.. scalar @$row -1) {
        push @{$rotated[$_]}, $row->[$_];
    }
}
print "rotated\n";
for my $row( @rotated) {
    print "@$row\n";
}

$dbh->disconnect();
__END__

$ mysql -t -e "select * from test.testgraph"
+------+------+------+
| c1   | c2   | c3   |
+------+------+------+
|    1 |   10 |  100 |
|    2 |   20 |  200 |
|    3 |   30 |  300 |
|    4 |   40 |  400 |
+------+------+------+

$ perl testgraph.pl
straight
1 10 100
2 20 200
3 30 300
4 40 400
rotated
1 2 3 4
10 20 30 40
100 200 300 400

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In reply to Re: GD::GRAPH using DBI Data. by gmax
in thread GD::Graph using DBI Data. by jwherbold

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