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Combine files from folder examples in Power Query

Learn practical Power Query Combine files from folder examples with M code, UI steps, common mistakes, FAQs and copy-ready transformation patterns.

Updated 2026-06-125 practical examplesCopy-ready M code

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When to use this Power Query pattern

Use this pattern when the same data preparation step needs to happen every time a file, table or report refreshes.

Syntax or pattern

Table.AddColumn(Source, "New Column", each [Value])

Typical UI steps

  1. Open Power Query Editor.
  2. Choose Append Queries or Combine Files.
  3. Select the source queries or folder.
  4. Review column names and data types.
  5. Load the combined result.
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5 practical examples

1

Use Combine files from folder in a sales report

This example shows how to use Combine files from folder when preparing a sales report.

Table.AddColumn(Source, "New Column", each [Value])

Use this pattern when the sales report needs a repeatable transformation instead of manual cleanup.

2

Use Combine files from folder in a customer list

This example shows how to use Combine files from folder when preparing a customer list.

Table.AddColumn(CleanSource, "New Column", each [Value])

Use this pattern when the customer list needs a repeatable transformation instead of manual cleanup.

3

Use Combine files from folder in a inventory export

This example shows how to use Combine files from folder when preparing a inventory export.

Table.AddColumn(Inventory, "New Column", each [Value])

Use this pattern when the inventory export needs a repeatable transformation instead of manual cleanup.

4

Use Combine files from folder in a monthly dashboard

This example shows how to use Combine files from folder when preparing a monthly dashboard.

Table.AddColumn(ReportData, "New Column", each [Value])

Use this pattern when the monthly dashboard needs a repeatable transformation instead of manual cleanup.

5

Use Combine files from folder in a operations tracker

This example shows how to use Combine files from folder when preparing a operations tracker.

Table.AddColumn(Tracker, "New Column", each [Value])

Use this pattern when the operations tracker needs a repeatable transformation instead of manual cleanup.

Common mistakes to avoid

  • Applying steps in an order that makes later cleaning harder.
  • Forgetting that step names are referenced by later M code.
  • Not checking row counts before and after transformations.

Related Power Query examples

🔄 Merge queries🔄 Append queries🔄 Table.NestedJoin🔄 Table.Combine🔄 All Power Query examples

FAQ

When should I use Combine files from folder in Power Query?

Use Combine files from folder when the transformation should be repeatable every time the data refreshes.

Can I do Combine files from folder from the Power Query interface?

Usually yes. The interface creates the M code for many common transformations, and you can adjust it in the formula bar or Advanced Editor.

Should I edit the M code manually?

Edit M manually when the interface cannot express the pattern clearly, or when you need reusable logic, parameters or cleaner step names.