Question

What is a STAR Schema, and how is it arranged in the dimensional data model?

a.

A schema for database replication; arranged in a star formation

b.

A schema for database schema changes; arranged in a star formation

c.

The arrangement of fact and dimension tables in the dimensional data model; resembling a star formation, with the fact table placed in the middle surrounded by dimension tables

d.

The arrangement of fact and dimension tables in a relational database; resembling a star formation, with the dimension table placed in the middle surrounded by fact tables

Posted under Data Warehousing and OLAP

Answer: (c).The arrangement of fact and dimension tables in the dimensional data model; resembling a star formation, with the fact table placed in the middle surrounded by dimension tables Explanation:A STAR Schema is the arrangement of the collection of fact and dimension tables in the dimensional data model, resembling a star formation, with the fact table placed in the middle surrounded by the dimension tables. Each dimension table is in a one-to-many relationship with the fact table.

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