The correct answer is to mark the table as a date table in the model view by selecting the date column. This action explicitly tells Power BI that the table contains a contiguous, complete set of dates, which is essential for time intelligence calculations like TOTALYTD or SAMEPERIODLASTYEAR. Without this explicit marking, Power BI relies on auto-generated date hierarchies, which can break DAX functions when your source data comes from an Azure SQL Database. On the PL-300 exam, this scenario tests your understanding of how to properly configure a date table for time intelligence, often appearing as a distractor where candidates mistakenly try to create a calculated table or use the Auto Date/Time feature. A common trap is assuming Power BI automatically recognizes any date column, but the key is that you must manually designate it in Model view. Memory tip: think “Mark the Date” to recall that you must actively mark the table, not just rely on automatic detection.
PL-300 Prepare the data Practice Question
This PL-300 practice question tests your understanding of prepare the data. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
You are preparing a Power BI report that uses data from Azure SQL Database. The data includes a date column that needs to be used in time intelligence calculations. You want to ensure that the date column is recognized as a date table in the data model. What should you do?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
In the model view, mark the table as a date table by selecting the date column.
Option C is correct because marking a table as a date table in the model view explicitly tells Power BI that the table contains a complete set of dates for time intelligence calculations. This ensures that DAX functions like TOTALYTD, SAMEPERIODLASTYEAR, and DATEADD work correctly by using the marked date column as the primary date reference for the model, rather than relying on auto-generated date hierarchies.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Set the data type of the date column to Date.
Why it's wrong here
Setting data type to Date does not mark the table as a date table.
✗
Use the DAX function DATEADD to create a date table.
Why it's wrong here
DATEADD is used for calculations, not for marking a date table.
✓
In the model view, mark the table as a date table by selecting the date column.
Why this is correct
Marking a table as a date table enables time intelligence functions.
Related concept
Read the scenario before looking for a memorised answer.
✗
Create a calculated column using DATEVALUE to convert the date.
Why it's wrong here
Creating a calculated column does not mark the table as a date table.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse setting a column's data type to Date with marking the table as a date table, assuming the data type alone is sufficient for time intelligence, but Power BI requires explicit table marking to enable proper date filtering and DAX time functions.
Detailed technical explanation
How to think about this question
When you mark a table as a date table, Power BI validates that the date column contains unique, non-blank values covering a continuous range from the earliest to the latest date used in the model. This marking also disables auto-generated date hierarchies for that column, preventing ambiguity in time intelligence calculations. In real-world scenarios, failing to mark a date table can lead to incorrect results in measures like TOTALYTD when multiple date columns exist in the model.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Prepare the data — This question tests Prepare the data — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: In the model view, mark the table as a date table by selecting the date column. — Option C is correct because marking a table as a date table in the model view explicitly tells Power BI that the table contains a complete set of dates for time intelligence calculations. This ensures that DAX functions like TOTALYTD, SAMEPERIODLASTYEAR, and DATEADD work correctly by using the marked date column as the primary date reference for the model, rather than relying on auto-generated date hierarchies.
What should I do if I get this PL-300 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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