Question

How does the STAR schema facilitate drill-down and roll-up in data warehouse queries?

a.

It requires complex navigation through intermediary tables.

b.

It uses specialized indexes to boost drill-down performance.

c.

It simplifies selection from fact table rows for both drill-down and roll-up.

d.

It employs complex multitable joins to enable drill-down and roll-up.

Posted under Data Warehousing and OLAP

Answer: (c).It simplifies selection from fact table rows for both drill-down and roll-up. Explanation:The STAR schema simplifies the selection of fact table rows for both drill-down and roll-up, making these operations efficient.

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Q. How does the STAR schema facilitate drill-down and roll-up in data warehouse queries?

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