Q. What issues can arise when using operational system keys as primary keys for dimension tables?

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Q. What is the first principle to consider when choosing primary keys for dimension tables?

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Q. What are surrogate keys in dimension tables?

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Q. How are operational system keys typically handled in dimension tables when surrogate keys are used?

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Q. Why do dimension tables often use surrogate keys?

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Q. In a STAR schema, why must the primary key of each dimension table also be a foreign key in the fact table?

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Q. Which option is commonly used for defining primary keys in a STAR schema fact table?

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Q. What is the fundamental difference between the STAR schema and relational schemas for OLTP systems?

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

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Q. What is one of the key advantages of the STAR schema for data warehousing?

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Q. In the context of a STAR schema, what does "denormalized" refer to?

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Q. In a data warehouse, what distinguishes users of decision support systems, such as data warehouses, from users of OLTP systems?

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Q. How does the STAR schema differ from the relational schema of an OLTP system in terms of user-friendliness?

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Q. Why is the STAR schema considered to be intuitively understood by users?

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Q. How does the STAR schema optimize navigation in the database?

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Q. In the context of a STAR schema, what happens when you have a seemingly complex query to resolve a specific problem?

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Q. Why is the STAR schema considered most suitable for query processing in a data warehouse?

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Q. In a three-dimensional query using the STAR schema, what is the typical sequence of operations to obtain the final result?

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Q. How does the STAR schema facilitate drill-down and roll-up in data warehouse queries?

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Q. What is STARjoin, and how does it contribute to query performance in the STAR schema?

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