PL-300 Prepare the data Practice Question
You are importing data from an Excel workbook that contains multiple sheets. Each sheet has similar structure but different data for different regions. You need to combine all sheets into a single table for analysis. What should you do?
⚠ Common exam trap
Watch out — candidates often confuse Merge Queries (which combines columns via joins) with Append Queries (which combines rows), leading them to select Option A when the requirement is to stack data from multiple sheets.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
In Power Query Editor, use Append Queries to combine the sheets.
The Append Queries operation in Power Query Editor is designed to combine rows from multiple tables or queries with similar column structures into a single table. Since each sheet in the Excel workbook contains data for different regions with the same structure, appending them stacks the rows, creating a unified dataset for analysis.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
In Power Query Editor, use Merge Queries to combine the sheets.
Why it's wrong here
Merge is for joining columns, not appending rows.
- ✓
In Power Query Editor, use Append Queries to combine the sheets.
Why this is correct
Append Queries adds rows from one table to another.
- ✗
Copy and paste the data from each sheet into a master sheet in Excel.
Why it's wrong here
Manual process is error-prone and not scalable.
- ✗
In Power Query Editor, use Group By to consolidate the data.
Why it's wrong here
Group By aggregates data, not combines sheets.
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