Temporal database systems extend traditional relational database systems. One important such extension is to support time-varying aggregation.
时态数据库扩展了传统的关系数据库，其中一个重要的扩展就是对于时态聚集查询的支持。
In the whole process flow, data aggregation is the key stage to realize parallel importing. The aggregation method of temporal data is described in detail.
在整个处理流程中，数据整合是实现并行导入的关键步骤，详细描述了历史数据并行整合的方法。
In the whole process flow, data aggregation is the key stage to realize parallel importing. The aggregation method of temporal data is described in detail.
在整个处理流程中，数据整合是实现并行导入的关键步骤，详细描述了历史数据并行整合的方法。
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