Question

What is the key of the fact table in a data warehouse based on?

a.

The concatenation of keys from fact tables

b.

The concatenation of keys from dimension tables

c.

The concatenation of keys from both fact and dimension tables

d.

The time stamp in the source systems

Posted under Data Warehousing and OLAP

Answer: (c).The concatenation of keys from both fact and dimension tables Explanation:The key of the fact table in a data warehouse is based on the concatenation of keys from both fact and dimension tables.

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