1.How is transaction time typically represented in a dimensional model? 2. What is a constellation of stars? 3. What is the difference between a detailed fact table and an aggregated fact table? 4....

1.How is transaction time typically represented in a dimensional model? 2. What is a constellation of stars? 3. What is the difference between a detailed fact table and an aggregated fact table? 4. What does granularity of the fact table refer to? 5. What are the most common approaches for handling slowly changing dimensions? 6. Why is snowflaking usually not used in dimensional modeling?