Question

When might a denormalized dimension table not be desirable in a STAR schema?

a.

When the data warehouse has a large number of customers

b.

When query performance is a top priority

c.

When the fact table is small in size

d.

When using concatenated primary keys

Posted under Data Warehousing and OLAP

Answer: (a).When the data warehouse has a large number of customers Explanation:A denormalized dimension table may not be desirable in a STAR schema when the data warehouse has a large number of customers, as it can increase the size of the fact table.

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