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Question

In Type 1 changes, when should the old value in the source system be preserved?

a.

Always

b.

When there is no significance to the change

c.

Only if the change is related to marital status

d.

When the change is a correction of an error

Posted under Data Warehousing and OLAP

Answer: (d).When the change is a correction of an error Explanation:The old value in the source system needs to be preserved in Type 1 changes only when the change is a correction of an error.

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Q. In Type 1 changes, when should the old value in the source system be preserved?
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