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Question

Why do users in a data warehouse often start with summary data when querying for analysis?

a.

It saves time

b.

They prefer high-level data

c.

It's more efficient

d.

Summary data provides more accurate results

Posted under Data Warehousing and OLAP

Answer: (c).It's more efficient Explanation:Users often start with summary data in a data warehouse because it's more efficient and allows them to drill down to lower levels of detail as needed.

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Q. Why do users in a data warehouse often start with summary data when querying for analysis?
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