Question

What is the primary reason for the complexity and importance of ETL functions in data warehousing?

a.

Extensive data storage requirements

b.

The need for frequent full data refreshes

c.

The variety and heterogeneity of source systems

d.

The lack of suitable ETL tools

Posted under Data Warehousing and OLAP

Answer: (c).The variety and heterogeneity of source systems Explanation:The variety and heterogeneity of source systems contribute to the complexity and importance of ETL functions in data warehousing.

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Q. What is the primary reason for the complexity and importance of ETL functions in data warehousing?

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