Question

When are Type 3 changes typically used in data warehousing?

a.

To correct errors in the source system

b.

To preserve historical data

c.

To count orders in two ways for a certain period

d.

To track changes in the source system

Posted under Data Warehousing and OLAP

Answer: (c).To count orders in two ways for a certain period Explanation:Type 3 changes are typically used in data warehousing to count orders in two ways for a certain period, allowing the ability to track forward and backward.

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