Question

How does the time-variant nature of data in a data warehouse contribute to its functionality?

a.

It makes data in the data warehouse identical to operational data.

b.

It allows for real-time data updates.

c.

It relates information to the present and enables analysis of the past and forecasts for the future.

d.

It reduces the need for data movements in the data warehouse.

Posted under Data Warehousing and OLAP

Answer: (c).It relates information to the present and enables analysis of the past and forecasts for the future. Explanation:The time-variant nature of data in a data warehouse enables it to relate information to the present, support analysis of the past, and enable forecasts for the future.

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