Question

When might summarization be part of the data transformation function?

a.

When data at the lowest level of detail is needed for analysis

b.

When the source data is already summarized

c.

When data at the lowest granularity is not needed for analysis

d.

When all users require the lowest level of detail

Posted under Data Warehousing and OLAP

Answer: (c).When data at the lowest granularity is not needed for analysis Explanation:Summarization may be part of the data transformation function when data at the lowest granularity is not needed for analysis, and a more aggregated view is sufficient.

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