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Question

How do EII products handle queries directed at virtual data views?

a.

They execute each query directly on the data sources.

b.

They execute subqueries directed at appropriate data sets.

c.

They consolidate all queries into a single database query.

d.

They rely on ETL for query execution.

Posted under Data Warehousing and OLAP

Answer: (b).They execute subqueries directed at appropriate data sets. Explanation:EII products execute subqueries directed at appropriate data sets, and then combine the results into a unified response.

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Q. How do EII products handle queries directed at virtual data views?
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