Quick Answer
The answer is Append Queries, because this operation is specifically designed to combine rows from two or more tables that share identical column structures, stacking the data vertically. In Power Query, append queries vs merge queries is a fundamental distinction: append adds rows (vertical combination), while merge joins columns (horizontal combination) based on a key. For the Microsoft Power BI Data Analyst PL-300 exam, this question tests your understanding of data shaping operations, often appearing in scenarios where you need to consolidate historical data like monthly sales tables. A common trap is confusing append with merge when the requirement is simply to stack records rather than enrich them with related fields. Remember the memory tip: “Append adds rows, merge matches columns”—if you’re just piling on more records with the same fields, append is your tool.
This PL-300 practice question tests your understanding of prepare 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.
A data analyst needs to combine two queries in Power Query: 'Sales2023' and 'Sales2024', both with identical column structures. Which operation should the analyst use to append the rows from 'Sales2024' to 'Sales2023'?
Append Queries
Append stacks rows from multiple tables.
Merge Queries
Why wrong: Merge combines columns, not rows.
Group By
Why wrong: Group By aggregates rows.
Pivot Column
Why wrong: Pivot transforms distinct values into columns.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Append Queries
The Append Queries operation in Power Query is designed to combine rows from two or more tables with identical column structures, stacking the rows of 'Sales2024' beneath those of 'Sales2023'. This is the correct method because it preserves all columns and adds data vertically, which matches the requirement to append rows.
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.
Append Queries
Why this is correct
Append stacks rows from multiple tables.
Related concept
Read the scenario before looking for a memorised answer.
Merge Queries
Why it's wrong here
Merge combines columns, not rows.
Group By
Why it's wrong here
Group By aggregates rows.
Pivot Column
Why it's wrong here
Pivot transforms distinct values into columns.
Common exam traps
The trap here is that candidates often confuse Append Queries with Merge Queries, thinking both combine data, but Merge Queries joins columns horizontally (like a SQL JOIN) while Append Queries stacks rows vertically.
Detailed technical explanation
Under the hood, Append Queries in Power Query uses the Table.Combine function in M language, which requires all tables to have the same column names and data types; mismatches cause errors or type coercion. In real-world scenarios, this is commonly used for consolidating monthly sales data or merging historical records where schemas are identical, and it can handle multiple tables in a single append operation.
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
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FAQ
Prepare the data — This question tests Prepare the data — Read the scenario before looking for a memorised answer..
The correct answer is: Append Queries — The Append Queries operation in Power Query is designed to combine rows from two or more tables with identical column structures, stacking the rows of 'Sales2024' beneath those of 'Sales2023'. This is the correct method because it preserves all columns and adds data vertically, which matches the requirement to append rows.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 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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