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  1. or download this
      SELECT
    group, somedata
...
    table
  ORDER BY
    group, somedata
  2. or download this
      my $lastgroup = undef;
  while ( my $row = $sth->fetchrow_arrayref() ) {
...
    }
    print( "  " . $row->[1] . "\n" );
  }
  3. or download this
      my $lastgroup = undef;
  while ( my $row = $sth->fetchrow_arrayref() ) {
...
    }
    print( "  " . $row->[1] . "\n" );
  }