my @output_cols = qw( name state location school birth birthplace );

my $csv_in = Text::CSV->new({
   auto_diag => 1,
   binary    => 1,
});

my $csv_out = Text::CSV->new({
   auto_diag => 1,
   binary    => 1,
   eol       => "\n",
   sep_char  => "^",
});

my %school_by_name;
{
   open(my $fh_in, '<', 'dataa.txt')
      or die($!);

   $csv_in->column_names( $csv_in->getline($fh_in) );

   while (my $row = $csv_in->getline_hr($fh_in)) {
      $school_by_name{ $row->{name} } = $row;
   }
}

open(my $fh_in,  '<', 'datab.txt')
   or die($!);
open(my $fh_out, '>', 'datac.txt')
   or die($!);

$csv_in->column_names( $csv_in->getline($fh_in) );
$csv_out->print($fh_out, \@output_cols);

while (my $row = $csv_in->getline($fh_in)) {
   my $name = $row->{name};

   my $school_row = $school_by_name{$name}
      or die("Can't find school for $name\n");

   %$row = ( %$school_row, %$row );

   $csv_out->print($fh_out, [ @$row{@output_cols} ]);
}