Quick Answer
The answer is a separate date table marked as a date table, a relationship between that date table and the churn date column, and a CALCULATE measure with a time-intelligence filter. These three components work together because Power BI’s time-intelligence functions, such as DATESINPERIOD or DATESBETWEEN, require a properly marked date table with a continuous date range to calculate the churn count for the last 30 days accurately. The relationship links the date table to your churn fact table, while CALCULATE modifies the filter context to restrict the count to only those customers whose churn date falls within the trailing 30-day window. On the PL-300 exam, this scenario tests your understanding of time-intelligence best practices and the common trap of trying to use a calculated column or a disconnected table instead of a proper date table. A helpful memory tip is “Date table, relationship, CALCULATE—three legs of the time-intelligence stool.”
This PL-300 practice question tests your understanding of visualize and analyze the data. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 creating a Power BI report to analyze customer churn. You have a table with Customer ID, Churn Date, and other attributes. You want to create a measure that calculates the number of customers who churned in the last 30 days. Which THREE components do you need?
A measure using CALCULATE, COUNTROWS, and DATESINPERIOD
Standard approach for dynamic period calculation.
A calculated column for 30-day flag
Why wrong: Can be done in measure without column.
A relationship between date table and Churn Date
Enables filtering by date.
A separate date table marked as date table
Needed for time intelligence functions.
A disconnected table with date range
Why wrong: Unnecessary; date table is used.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
A measure using CALCULATE, COUNTROWS, and DATESINPERIOD
Options A, B, and E are correct: a date table (A) for time intelligence, a relationship (B) between date table and churn date, and a CALCULATE measure (E) with appropriate filter. Option C is incorrect because a calculated column is not required. Option D is incorrect because a disconnected table is not necessary.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
A measure using CALCULATE, COUNTROWS, and DATESINPERIOD
Why this is correct
Standard approach for dynamic period calculation.
Related concept
Read the scenario before looking for a memorised answer.
A calculated column for 30-day flag
Why it's wrong here
Can be done in measure without column.
A relationship between date table and Churn Date
Why this is correct
Enables filtering by date.
Related concept
Read the scenario before looking for a memorised answer.
A separate date table marked as date table
Why this is correct
Needed for time intelligence functions.
Related concept
Read the scenario before looking for a memorised answer.
A disconnected table with date range
Why it's wrong here
Unnecessary; date table is used.
Common exam traps
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
Identify which PL-300 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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FAQ
Visualize and analyze the data — This question tests Visualize and analyze the data — Read the scenario before looking for a memorised answer..
The correct answer is: A measure using CALCULATE, COUNTROWS, and DATESINPERIOD — Options A, B, and E are correct: a date table (A) for time intelligence, a relationship (B) between date table and churn date, and a CALCULATE measure (E) with appropriate filter. Option C is incorrect because a calculated column is not required. Option D is incorrect because a disconnected table is not necessary.
Identify which PL-300 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 21, 2026
This PL-300 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PL-300 exam.
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