Microsoft Exam DP-600 Topic 2 Question 26 Discussion

Actual exam question for Microsoft's DP-600 exam

Question #: 26
Topic #: 2

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.

Aan effective end date and time

Ba foreign key

Ca surrogate key

Da natural key

Ean effective start date and time

Show Suggested Answer

Suggested Answer: A, C, E

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.

by Mila at Sep 16, 2024, 05:11 PM

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Barabara

3 months ago

In addition to a surrogate key, we should also recommend adding an effective start date and time for tracking changes over time.

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Mari

3 months ago

I'm going with A, C, and E. Gotta have those effective dates to track changes over time. And the surrogate key keeps things nice and tidy. B and D are just distractions in this case.

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Refugia

2 months ago

Exactly, we need to focus on the effective dates and keys for this design.

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Annelle

2 months ago

I think B and D are unnecessary for this type of dimension table.

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Ahmad

2 months ago

Definitely, those columns will help us track changes accurately.

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Raylene

2 months ago

I agree, A, C, and E are the way to go for a Type 2 SCD.

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Carin

3 months ago

Haha, this is an easy one! A, C, and E, of course. You can't have a slowly changing dimension without the effective dates. And the surrogate key is a must. What were the other options even thinking?

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Hubert

2 months ago

It's important to have the effective dates and a surrogate key for accurate historical data.

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Brandon

2 months ago

Yeah, those columns are essential for tracking changes in the customer dimension.

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Lenna

2 months ago

I agree, A, C, and E are definitely the right choices for a Type 2 SCD.

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Alva

3 months ago

I agree with Farrah and Brandon. A, C, and E are the way to go. The natural key might be useful too, but the surrogate key is crucial for the SCD.

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Edelmira

3 months ago

I agree with Joesph, a surrogate key would help uniquely identify each customer.

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Brandon

3 months ago

Definitely A, C, and E. You can't have a proper Type 2 SCD without the effective start and end dates. And a surrogate key is essential for maintaining a stable primary key.

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Marshall

2 months ago

Definitely, those columns are necessary for properly managing a Type 2 slowly changing dimension.

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Elinore

2 months ago

Adding a foreign key can establish a relationship with other tables in the star schema.

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Judy

2 months ago

Yes, the surrogate key will help uniquely identify each record in the dimension table.

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Shad

2 months ago

I agree, having the effective start and end dates is crucial for tracking changes over time.

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Joesph

3 months ago

I think we should recommend adding a surrogate key to the customer dimension table.

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Farrah

3 months ago

I think the correct answer is A, C, and E. We need to track the effective start and end dates to handle changes in customer data over time.

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Gwenn

2 months ago

Yes, those columns are essential for tracking changes in customer data over time.

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Marlon

3 months ago

I agree with you, A, C, and E are the correct choices for a Type 2 SCD.

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