code: def fetch_num_records(self, table_name, where=None):
          
  
          return self.fetch_value(select="COUNT(*)", table_name=table_name, where=where)
docs: Fetch the number of records in a table.
  
          :param str table_name: Table name to get number of records.
          :param where: |arg_select_where|
          :type where: |arg_where_type|
          :return:
              Number of records in the table.
              |None| if no value matches the conditions,
              or the table not found in the database.
          :rtype: int