Q. What are surrogate keys in dimension tables?

View solution

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

View solution

Q. Why do dimension tables often use surrogate keys?

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

Q. How does STARindex enhance query performance in the STAR schema?

View solution

Q. Which of the following is a key characteristic of a STAR schema used in data design for data warehouses?

View solution