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Question

What drives the need for summarization and aggregation in a data warehouse?

a.

Increasing the number of dimensions in the data warehouse

b.

The desire to make aggregates visible to end-users

c.

Improved query performance

d.

Focusing on accommodating power users' requirements

Answer: (c).Improved query performance Explanation:The need for summarization and aggregation is primarily driven by the desire to improve query performance.

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Q. What drives the need for summarization and aggregation in a data warehouse?

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