Qlik QSDA2024 Exam - Topic 3 Question 9 Discussion

Actual exam question for Qlik's QSDA2024 exam

Question #: 9
Topic #: 3

[All QSDA2024 Questions]

Exhibit.

Refer to the exhibit.

A data architect is working on a Qlik Sense app the business has created to analyze the company orders and shipments.

To understand the table structure, the business has given the following summary:

* Every order creates a unique orderlD and an order date in the Orders table

* An order can contain one or more order lines one for each product ID in the order details table

* Products In the order are shipped (shipment date) as soon as they are ready and can be shipped separately

* The dates need to be analyzed separately by Year, Month, and Quarter

The data architect realizes the data model has issues that must be fixed. Which steps should the data architect perform?

A1. Create a key with OrderlD and ProductID in the OrderDetails table and in the Shipments table
2. Delete the ShipmentID in the Orders table
3. Delete the ProductID and OrderlD in the Shipments table
4. Left join Orders and OrderDetails
5. Use Derive statement with the MasterCalendar table and apply the derive fields to OrderDate and ShipmentDate

B1. Create a key with OrderlD and ProductID In the OrderDetails table and in the Orders table
2. Delete the ShipmentID in the Shipments table
3. Delete the ProductID and OrderlD in the OrderDetails table
4. Concatenate Orders and OrderDetails
5. Create a link table using the MasterCalendar table and create a concatenated field between OrderDate and ShipmentDate

C1. Create a key with OrderlD and ProductID in the OrderDetails table and in the Shipments table
2. Delete the ShipmentID in the Orders table
3. Delete the ProductID and OrderlD In the Shipments table
4. Concatenate Orders and OrderDetails
5. Create a link table using the MasterCalendar table and create a concatenated field between OrderDate and ShipmentDate

D1. Create a key with OrderlD and ProductID in the OrderDetails table and in the Orders table
2. Delete the ShipmentID in the Shipments table
3. Delete the ProductID and OrderlD in the OrderDetails table
4. Left join Orders and OrderDetails
5. Use Derive statement with the MasterCalendar table and apply the derive fields to OrderDate and ShipmentDate

Show Suggested Answer

Suggested Answer: C

In the given data model, there are several issues related to table relationships and key fields that need to be addressed to create a functional and optimized data model. Here's how each step in the chosen solution (Option C) resolves these issues:

Create a key with OrderID and ProductID in the OrderDetails table and in the Shipments table:

By creating a composite key with OrderID and ProductID, you uniquely identify each line item in both the OrderDetails and Shipments tables. This step is crucial for ensuring that each product within an order is correctly associated with its respective shipment.

Delete the ShipmentID in the Orders table:

The ShipmentID in the Orders table is redundant because the Shipments table already captures this information at a more granular level (i.e., at the product level). Removing ShipmentID avoids potential circular references or synthetic keys.

Delete the ProductID and OrderID in the Shipments table:

After creating the composite key in step 1, the individual ProductID and OrderID fields in the Shipments table are no longer necessary for joins. Removing them reduces redundancy and simplifies the table structure.

Concatenate Orders and OrderDetails:

Concatenating Orders and OrderDetails into a single table creates a unified table that contains all necessary order-related information. This helps in simplifying the model and avoiding issues related to managing separate but related tables.

Create a link table using the MasterCalendar table and create a concatenated field between OrderDate and ShipmentDate:

A link table is created to associate the combined table with the MasterCalendar. By creating a concatenated field that combines OrderDate and ShipmentDate, you ensure that both dates are properly linked to the calendar, allowing for accurate time-based analysis.

by Franchesca at Sep 16, 2024, 07:46 PM

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Regenia

3 months ago

Not sure about deleting ProductID in the Shipments table, seems risky.

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Alaine

3 months ago

Definitely need to create those keys in the OrderDetails table!

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Cecilia

3 months ago

Surprised there are so many steps involved! Thought it would be simpler.

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Han

4 months ago

I disagree, B seems more straightforward with the concatenation.

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Anjelica

4 months ago

Looks like option A is the best choice for fixing the data model.

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Timothy

4 months ago

I recall that using the MasterCalendar table is crucial for date analysis, but I can't remember if we should derive fields or concatenate them.

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Louis

4 months ago

I feel like I might be mixing up the steps for deleting IDs in the tables. Shouldn't we be careful about which IDs we remove?

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Rikki

4 months ago

I think option B sounds familiar because it mentions creating a link table, which we practiced in a similar question.

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Samira

5 months ago

I remember we discussed the importance of creating keys for proper joins, but I'm not sure if it's better to concatenate or left join in this case.

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Gilbert

5 months ago

I feel pretty confident about this question. The steps seem straightforward, and I've worked with similar data structures before. I'll just need to double-check my work to make sure I haven't overlooked anything.

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Lavina

5 months ago

This is a good opportunity to demonstrate my data modeling skills. I'll need to be thorough in my approach and make sure I don't miss any important details.

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Linwood

5 months ago

Okay, I think I've got a good handle on this. The key is creating the right relationships between the tables and using the MasterCalendar table to get the date analysis we need.

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Helga

5 months ago

Hmm, I'm a bit confused by the different table structures mentioned. I'll need to make sure I understand the relationships between the tables before I start making changes.

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Valda

5 months ago

This looks like a tricky data modeling question. I'll need to carefully read through the requirements and think through the steps to get the data structure right.

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Armanda

1 year ago

I bet the data architect is wishing they had a magic 'Fix-It' button right about now. Gotta love those complex data models!

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Lou

1 year ago

Yeah, having a 'Fix-It' button would definitely make things easier for the data architect.

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Lou

1 year ago

I think the data architect should carefully follow the steps provided to fix the issues.

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Lou

1 year ago

I know, data modeling can be a real headache sometimes.

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Val

1 year ago

Wait, did they just suggest deleting the ShipmentID in the Orders table? That's like cutting off your arm to fix a papercut!

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Flo

1 year ago

I like the idea of using a Derive statement with the MasterCalendar table to apply the fields to OrderDate and ShipmentDate. It's a clever way to handle the date analysis.

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Louvenia

1 year ago

A: Definitely, having a clear structure for the data and utilizing the MasterCalendar table for date analysis will improve the overall data model.

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Simona

1 year ago

B: I agree, option A seems to address the issues in the data model effectively. It's important to handle the dates separately for analysis.

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Fabiola

1 year ago

A: I think option A is the way to go. It suggests creating a key with OrderID and ProductID, deleting unnecessary fields, and using Derive statement for date analysis.

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Abel

1 year ago

Concatenating Orders and OrderDetails, and creating a link table using the MasterCalendar table is a great way to analyze the dates by year, month, and quarter.

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Rodolfo

1 year ago

B) 5. Create a link table using the MasterCalendar table and create a concatenated field between OrderDate and ShipmentDate

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Justine

1 year ago

B) 4. Concatenate Orders and OrderDetails

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Candra

1 year ago

B) 3. Delete the ProductID and OrderID in the OrderDetails table

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Lilli

1 year ago

B) 2. Delete the ShipmentID in the Shipments table

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Carline

1 year ago

B) 1. Create a key with OrderID and ProductID in the OrderDetails table and in the Orders table

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Arminda

1 year ago

I'm not sure about the derive statement with the MasterCalendar table. Maybe using a left join between Orders and OrderDetails would be better for analyzing the dates separately.

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Gladys

1 year ago

Deleting the ShipmentID from the Shipments table and the ProductID and OrderID from the OrderDetails table is crucial to simplify the data structure.

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Yaeko

1 year ago

I agree with Ona. Deleting the ShipmentID in the Shipments table and creating a link table with the MasterCalendar seems like the right steps to fix the data model.

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