code: def _createTotalsDict(self, headers, rows):
          
          totals = [sum(col) for col in zip(*rows)[1:]]
          return dict(zip(headers[1:], totals))
docs: Utility method that returns totals for database statistics.
          
          @param headers: List of columns in query result.
          @param rows:    List of rows in query result.
          @return:        Dictionary of totals for each statistics column.