Question

Why is ongoing data extraction required in a data warehouse?

a.

To create an initial data load

b.

To eliminate the need for transformation

c.

To keep the data warehouse up to date

d.

To simplify data integration

Posted under Data Warehousing and OLAP

Answer: (c).To keep the data warehouse up to date Explanation:Ongoing data extraction is required to keep the data warehouse up to date with changes in source systems.

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