Are there any cases where the dimensional table is larger than the fact table? What are the methods in which I can take care of the slowly changing dimension fields?
Chuck Kelley's Answer: I imagine that if you have a large dimension table that contains rows that never point to a fact, then you could. I don't think that it is very common at all. Slowly changing dimensions are fun to do. Ralph Kimball describes three types (ways) to deal with them in his book The Data Warehouse Toolkit. Which type you use depends on your requirements. I prefer keeping a history of everything, so his "type 2" is the most common form I use.
Register or login for access to this item and much more
All Information Management content is archived after seven days.
Community members receive:
- All recent and archived articles
- Conference offers and updates
- A full menu of enewsletter options
- Web seminars, white papers, ebooks
Already have an account? Log In
Don't have an account? Register for Free Unlimited Access