it seems a couple of the responses used qw(Field1 Field2 Field3) as opposed to ("Field1","Field2","Field3"). What's the difference?

Short answer, there is no difference :).

Long answer, see perlop.

qw/STRING/
      Evaluates to a list of the words extracted out of
      STRING, using embedded whitespace as the word 
      delimiters.  It can be understood as being roughly
      equivalent to:

          split(' ', q/STRING/);

      the difference being that it generates a real list
      at compile time.  So this expression:

          qw(foo bar baz) 

      is semantically equivalent to the list:

          'foo', 'bar', 'baz'

      Some frequently seen examples:

          use POSIX qw( setlocale localeconv )
          @EXPORT = qw( foo bar baz );