在逻辑视图中，使用联合来组合和统一多个数据模型对象。您可以合并共享相似结构的数据集，从而提供更全面的数据分析。将值从一个对象附加到另一个对象会产生一个综合数据集，该数据集集成了各种来源的信息。
用例：您将来自不同营销渠道的参与数据存储在单独的表中。要全面了解受众如何在所有这些渠道参与市场营销工作，您可以创建这些数据集的组合来查看所有活动，从而更容易看到您的营销策略做得如何，并在整个计划中找到趋势。
在创建联合之前，您必须创建逻辑视图。请参阅创建逻辑视图。
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