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After you gather all the relevant information about the
subject area, the next step in the design process is to
determine the granularity of the fact table. To do this you
must decide what an individual low-level record in the fact
table should contain. The components that make up the
granularity of the fact table correspond directly with the
dimensions of the data model. Thus, when you define the
granularity of the fact table, you identify the dimensions
of the data model.
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