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Question 70 - DP-600 discussion

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You have a Fabric tenant that contains a warehouse.

You are designing a star schema model that will contain a customer dimension. The customer dimension table will be a Type 2 slowly changing dimension (SCD).

You need to recommend which columns to add to the table. The columns must NOT already exist in the source.

Which three types of columns should you recommend? Each correct answer presents part of the solution.

NOTE: Each correct answer is worth one point.

A.
an effective end date and time
Answers
A.
an effective end date and time
B.
a foreign key
Answers
B.
a foreign key
C.
a surrogate key
Answers
C.
a surrogate key
D.
a natural key
Answers
D.
a natural key
E.
an effective start date and time
Answers
E.
an effective start date and time
Suggested answer: A, C, E

Explanation:

For a Type 2 slowly changing dimension (SCD), you typically need to add the following types of columns that do not exist in the source system:

An effective start date and time (E): This column records the date and time from which the data in the row is effective.

An effective end date and time (A): This column indicates until when the data in the row was effective. It allows you to keep historical records for changes over time.

A surrogate key (C): A surrogate key is a unique identifier for each row in a table, which is necessary for Type 2 SCDs to differentiate between historical and current records.

asked 02/10/2024
Paul Bryant
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