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SAP VDM包括BASIC、COMPOSITE和CONSUMPTION三种模式。BASIC模式用于从源表和基本视图中拉取数据，但不用于报告。COMPOSITE模式作为基本视图和消费视图之间的接口，可以使用源表或不同视图组合成数据集。CONSUMPTION模式则是为了被报告层‘消费’。前两种视图主要在建模方法和代码复用方面有所区别。
SAP VDM有3种类型，分别是BASIC、COMPOSITE、CONSUMPTION
#BASIC – Used to pull data from the source tables as well as the other basic views but are not used in reporting.
#COMPOSITE – act as an interface between the basic and the consumption views. Can use source tables or different views to form a data set.
(The above 2 views are more or less the same. The difference is to do with the modeling methodology and the reusability of code.)
#CONSUMPTION – when the views have to be ‘consumed’ by the reporting layer.
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