Question

Why is it important to carefully choose summary and detail levels in a data warehouse?

a.

To eliminate the need for referential integrity checks

b.

To simplify the process of regular purging

c.

To optimize input – output operations based on user requirements

d.

To reduce the downtime during data corruption

Posted under Data Warehousing and OLAP

Answer: (c).To optimize input – output operations based on user requirements Explanation:It is important to carefully choose summary and detail levels in a data warehouse to optimize input – output operations based on user requirements.

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Q. Why is it important to carefully choose summary and detail levels in a data warehouse?

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