Why is the date dimension almost always included in a dimensional model?
- A It supplies calendar attributes such as fiscal period and holiday flags that dates alone cannot
- B It reduces storage
- C It enforces referential integrity
- D It speeds up joins only
Answer
It supplies calendar attributes such as fiscal period and holiday flags that dates alone cannot
Fiscal calendars, week numbering and business day flags cannot be derived reliably from a raw date at query time.





