code: def _get_field_comment(field, separator=' - '):
      
      title = field.descriptor.get('title') or ''
      description = field.descriptor.get('description') or ''
      return _get_comment(description, title, separator)
docs: Create SQL comment from field's title and description
  
      :param field: tableschema-py Field, with optional 'title' and 'description' values
      :param separator:
      :return:
  
      >>> _get_field_comment(tableschema.Field({'title': 'my_title', 'description': 'my_desc'}))
      'my_title - my_desc'
      >>> _get_field_comment(tableschema.Field({'title': 'my_title', 'description': None}))
      'my_title'
      >>> _get_field_comment(tableschema.Field({'title': '', 'description': 'my_description'}))
      'my_description'
      >>> _get_field_comment(tableschema.Field({}))
      ''