use strict;

my %tables = (
  'Table_1' => {'Schema' => 'dbo'},
  'Table_2' => {'Schema' => 'dbo'}
);

my %fields = (
  'Table_1' => {
    'Field_1' => {'Datatype' => 'int', 'Position' => 1},
    'Field_2' => {'Datatype' => 'char', 'Position' => 2},
    'Field_3' => {'Datatype' => 'int', 'Position' => 3}
  },
  'Table_2' => {
    'Field_1' => {'Datatype' => 'float', 'Position' => 1}
  }
);

foreach my $table (sort keys %tables)
{
  foreach my $field (sort {$fields{$table}{'Position'}{$a} <=> $fields{$table}{'Position'}{$b}} keys %{$fields{$table}})
  {
    print "$table -> $field\n";
  }
}

##</code><code>##

$fields{$tablename}{$fieldname}{'Position'}

##</code><code>##

$fields{$tablename}{'Position'}