PQM.guide

A community-driven Power Query M function reference, hosted at pqm.guide.

PQM.guide documents 161 Power Query M functions across 27 categories with clear syntax references, visual output examples, and practical best practices. Think of it as DAX.guide for the M language.

Contributing

PQM.guide is open to contributions from the Power Query community. Whether you want to fix a typo, improve an example, or add a new function page, here's how:

Quick edits

1. Fork this repository
2. Find the function file you want to edit in src/content/functions/ (e.g., table-addcolumn.mdx)
3. Make your changes and submit a pull request

Adding a new function page

Function pages are MDX files in src/content/functions/ with YAML frontmatter. Use any existing file as a template. Key rules:

• File naming: category-functionname.mdx in lowercase (e.g., text-contains.mdx)
• Examples must use shared sample tables (Sales, Customers, Products, Employees, OrderLog) — never Table.FromRecords for sample data
• Output format: Wrap expected output in <!--output ... --> HTML comments as JSON with columns and rows
• See the Sample Tables page for available data

Running locally

npm install
npm run dev

Open http://localhost:3000 to preview the site.

Suggesting changes without code

If you're not comfortable with pull requests, you can:

• Open an issue to report errors or suggest improvements
• Start a discussion to propose new content or features

Tech Stack

• Next.js 16 with App Router
• React 19
• Tailwind CSS 4
• TypeScript, MDX, PrismJS