Question

What is the method for applying Type 1 changes to the data warehouse?

a.

Append the new value to the attribute in the dimension table

b.

Overwrite the attribute value in the dimension table row with the new value

c.

Preserve both the old and new values in the dimension table

d.

Delete the entire dimension table row

Posted under Data Warehousing and OLAP

Answer: (b).Overwrite the attribute value in the dimension table row with the new value Explanation:The method for applying Type 1 changes to the data warehouse is to overwrite the attribute value in the dimension table row with the new value.

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Q. What is the method for applying Type 1 changes to the data warehouse?

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