docs: def result(self, *args, **kwargs):
          """
          Construye la consulta SQL
          """
          prettify = kwargs.get('pretty', False)
  
          sql = 'DELETE %s %s' % (self._type, self._class)
          
          if prettify:
              sql += '\n'
          else:
              sql += ' '
  
          if self.where_criteria.size() > 0:
              sql +=  'WHERE '
              sql +=  self.where_criteria.result()
              if prettify:
                  sql += '\n'
              else:
                  sql += ' '
          
          return sql