尽管DB 2 PE的历史数据只保留较短的时间(几小时或几天)，但是一旦数据被保存在PWH中，这些数据便可在很长的时间内用于报告和趋势分析。
While the history data of DB2 PE is only retained for a short time (hours or days), once data is in the PWH, the data is available for reporting and trend analysis over much longer periods.
可以考虑一下正从Exchange服务器迁移到Domino服务器的客户，他们需要保存他们的历史数据，以便在DAMO客户机中使用这些数据。
It's a given that customers who are moving from the Exchange to Domino server need to preserve their historic data for use in the DAMO client.
它可以实现长期在线运行，实时测量分析，对历史数据进行保存和查询等功能。
It can achieve a long-term online operation, a real-time measurement and analysis, preservation and query of historical data.
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