Interview Question #4: Slowly Changing Dimensions


Which type of Slowly Changing Dimension (SCD) would you use if your data was time dependent and you do not require historical comparisons?

A.  Like vs. Like

B.  As Is vs. As Was (Type II)

C.  As Is vs. As Is (Type I)

D.  As Is vs. As Was


C.   As Is vs. As Is (Type I) involves analyzing all data in accordance with the attribute relationships as they currently exist.

Regardless of how relationships change over time, you aggregate and qualify all data (current and historical) based on the current values in the lookup and relationship tables. If aggregate tables exist, you either have to modify how the values roll up to reflect the current attribute relationships, or you have to ignore the tables when you perform this type of analysis.

MicroStrategy Course Where You Will Learn About This Topic

MicroStrategy Advanced Data Warehousing Course


Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.