Whereas many data sources are oriented toward holding large quantities of transaction level detail, frequently the queries that support business decision-making involve summary, aggregated information.
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释义
尽管许多数据源都倾向于包含大量事务级别的详细信息,但是,支持业务决策制订所需的查询经常涉及汇总信息和聚合信息。
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