Power Query Problems

How to Dynamically Sort Power Query Columns by Month and Year

Huda Qurayshi Sep 28, 2026 870 views

Question details

The user needs to reorder Power Query columns that are labeled with month and year values into chronological order (e.g., January 2024, February 2024, March 2024).

How to Dynamically Sort Power Query Columns by Month and Year

Product: Excel / Power Query
Device & OS: not provided
Scenario: Organizing and preparing chronological data models for reporting.
Observed behavior: Columns are currently out of order or sorted alphabetically rather than chronologically by their header names (Month and Year).

Before you start

Before attempting to reshape your data, ensure your column headers have a consistent text format (like 'January 2024') that can be recognized as a valid date string.

Solution 1Recommended

Unpivot Columns and Use a Calendar Table (Recommended)

This is the best practice for data modeling. Instead of sorting column headers dynamically, unpivot the month columns into a single column to easily sort and link with a calendar table.

Having separate columns for each month is generally considered a poor data layout for long-term analysis. By unpivoting the data, you can build a robust model that easily integrates with standard Pivot Tables and time-intelligence functions.

Select Static Columns

In the Power Query Editor, select the columns that do not represent dates (e.g., ID, Product Name, Category).

Unpivot Other Columns

Right-click the selected column headers and choose 'Unpivot Other Columns'. This transforms your multiple month/year columns into an 'Attribute' column (containing the Month-Year names) and a 'Value' column.

Convert to Date Type

Select the new 'Attribute' column, change its data type to 'Date' from the Home tab, and rename it to 'Date'. You can now sort this single column chronologically.

Unpivot Columns and Use a Calendar Table (Recommended)

Best Practice: Unpivoting your data allows you to easily connect it to a master Calendar Table, making cross-year and cross-month reporting much more efficient.

Solution 2

Dynamically Sort Columns via Advanced Editor (M Code)

If you strictly need to keep the data pivoted with month headers, you can dynamically sort the column headers by extracting the names, converting them to dates, and reordering the table.

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Frequently Asked Questions

Why shouldn't I keep my months as separate columns in Power Query?

Keeping months as separate horizontal columns makes it difficult to perform time-intelligence calculations, filter dates across years, or build dynamic charts. Unpivoting the months into a single vertical date column is the recommended best practice for database modeling.

How do I unpivot columns in Power Query?

Select the static columns (like ID or Customer Name) that you do not want to alter, right-click their headers, and select 'Unpivot Other Columns'. The unselected month columns will be transformed into two vertical columns: Attribute (the month names) and Value (the data).

Can I sort text months chronologically instead of alphabetically?

Yes, but you must first convert the text (e.g., 'January 2024') into a Date data type. Power Query will then recognize the underlying serial date value and sort it chronologically from January to December, rather than alphabetically from April to September.

What is the Table.SelectColumns function used for?

The Table.SelectColumns function allows you to choose specific columns from a table and specify the exact order in which they should appear. You can pass a dynamically generated, sorted list of column names into this function to reorder your table on the fly.

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