Q. What is the relationship between dimension tables and the fact table in the STAR schema?

View solution

Q. What advantages does the STAR schema offer in decision support systems?

View solution

Q. In what ways can dimension tables be explored in the STAR schema?

View solution

Q. What is a key characteristic of the STAR schema design?

View solution

Q. How do dimension tables change over time in a data warehouse?

View solution

Q. What term is used to describe changes to dimension tables where attributes are overwritten with new values?

View solution

Q. When is overwriting of dimension table attributes considered appropriate in a data warehouse?

View solution

Q. What are the three types of dimension table changes in data warehousing?

View solution

Q. What type of changes involve preserving historical data in dimension tables?

View solution

Q. What is the primary nature of Type 1 changes in dimension tables?

View solution

Q. In Type 1 changes, when should the old value in the source system be preserved?

View solution

Q. What is the method for applying Type 1 changes to the data warehouse?

View solution

Q. When is Type 2 change applied to dimension tables?

View solution

Q. What is the essential requirement for implementing Type 2 changes in a data warehouse?

View solution

Q. How are orders for a customer with Type 2 changes in marital status separated in the data warehouse?

View solution

Q. What is the method for applying Type 2 changes to the data warehouse?

View solution

Q. What is the primary nature of Type 3 changes in dimension tables?

View solution

Q. When are Type 3 changes typically used in data warehousing?

View solution

Q. What is the purpose of Type 3 changes in data warehousing?

View solution

Q. What is the characteristic of Type 3 changes related to tracking orders through transitions?

View solution