Q. Why are dimension tables typically not normalized?

View solution

Q. How do attributes in a dimension table facilitate drilling down and rolling up in data analysis?

View solution

Q. What is the typical relationship between the number of records in a dimension table and the fact table in a data warehouse?

View solution

Q. What is the primary key of a fact table?

View solution

Q. What does the term "data grain" refer to in the context of a fact table?

View solution

Q. What is the characteristic of fully additive measures in a fact table?

View solution

Q. Which attribute in a fact table is an example of a semiadditive measure?

View solution

Q. How does the depth and width of a fact table typically compare to a dimension table?

View solution

Q. What is the term used to describe the situation when some rows in a fact table have null measures?

View solution

Q. What are attributes like order number and order line, which are neither facts nor dimension attributes, called in a fact table?

View solution

Q. What is a factless fact table?

View solution

Q. In a factless fact table representing student attendance, what value is typically recorded in each row to indicate attendance?

View solution

Q. What is one advantage of keeping the fact table at the lowest granularity level?

View solution

Q. What are the natural lowest levels of dimensions in a fact table?

View solution

Q. How do granular fact tables facilitate "graceful" changes to data models?

View solution

Q. Why do data warehouses feed data into data mining applications?

View solution

Q. In a dimension table, what is the primary key used for?

View solution

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

View solution

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

View solution

Q. What are surrogate keys in dimension tables?

View solution