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Writing M Code in Power Query

From Zero to Advanced | AI-Powered Data Transformation

Are you using Power Query but feel confused when you open the Advanced Editor and see M Code?

Do you want to move beyond clicking buttons and truly understand how Power Query works behind the scenes?

Writing M Code in Power Query is a practical, step-by-step guide designed to help professionals master the language that powers Power Query. Whether you are an accountant, analyst, student, or Excel user, this book will teach you how to confidently write and understand M Code—even if you have never written code before.

This book starts with the fundamentals and gradually moves toward advanced engineering techniques, helping you transform messy data into structured, automated workflows.

Using real-world business examples such as GST reports, sales analysis, bank reconciliation, payroll processing, and financial reporting, you will learn how to clean, transform, and automate data efficiently.

Unlike many technical books, this guide explains concepts in clear and simple language, making complex topics easy to understand.

What You Will Learn

• Understanding how Power Query works behind the scenes
• Writing and reading M Code step by step
• Creating custom columns and conditional logic
• Working with lists, records, and tables
• Building reusable custom functions
• Designing dynamic queries using parameters
• Handling errors and debugging queries
• Optimizing performance for large datasets
• Using modern AI tools to generate and improve M Code
• Building complete automated workflows using Power Query

Bonus Content

This book also includes a special bonus chapter with 50 advanced Power Query engineering examples, demonstrating powerful real-world transformations using custom functions and reusable logic patterns.

These examples show how professionals design scalable solutions for complex business data problems.

Who This Book Is For

• Excel users who want to master Power Query
• Accountants and finance professionals working with large datasets
• Data analysts who want deeper control over transformations
• Students learning modern data preparation tools
• Professionals looking to automate repetitive reporting tasks

If you want to move from basic Power Query usage to advanced data transformation mastery, this book will give you the knowledge and practical skills to build powerful automation systems.

Start your journey into M Code engineering and unlock the full potential of Power Query.

Author: CA Vikal Jain
Automation Specialist | Excel & Data Analytics Educator