class_docstr: Store information on generated alerts.
code: def sql_where_fragment(self):
      return self._COUNT_QUERY_WHERE_FRAGMENT.format(
          date=self._staged_at.date().isoformat(),
          hour=self._staged_at.hour,
          rule_name=self._rule_name,
      )
  
file_path: streamalert/streamalert/rule_promotion/statistic.py
label_desc: Use image node_id 5 for calling the StagingStatistic obj's underlying member method code with example usage: obj.sql_where_fragment() and returns: self