內容簡介
內容簡介 Learn how to use the Power Query M formula language and its functions effectively for better data modeling and impactful business intelligence reports. Purchase of the print or Kindle book includes a free PDF eBook Key Features: - Get comprehensive coverage of fundamental and advanced Power Query concepts - Gain hands-on experience with practical examples based on real-world problems - Delve into the intricacies of Power Query M language for enhanced data manipulation Book Description: Data transformation is a critical step in building data models and business intelligence reports. Power Query is an invaluable tool for anyone who wants to master data transformation, and this book will equip you with the knowledge and skills to make the most of it. The Definitive Guide to Power Query (M) will help you build a solid foundation in the Power Query M language. As you progress through the chapters, you'll learn how to use that knowledge to implement advanced concepts and data transformations. This will set the stage for an uncompromisingly thorough exploration of the Power Query M Language. You'll also get to grips with optimizing performance, handling errors, and implementing efficient data processing techniques. As this is a hands-on guide, the practical examples in the chapters will help you gain the skills to apply Power Query to real-world problems and improve your data analysis capabilities. By the end of this book, you will be able to leverage all of Power Query's remarkable capabilities for data transformation. What You Will Learn: - Gain a strong understanding of Power Query fundamentals - Master various functions within Power Query to perform complex data operations - Acquire knowledge about values, types, and control structures in Power Query - Develop proficiency in error handling techniques - Learn performance optimization strategies for Power Query - Apply what you've learned to real-world scenarios, including common troublesome patterns Who this book is for: This book is for business analysts, business intelligence professionals, and power business users working with data who want to add Power Query mastery to their resume. This book will be beneficial for anyone who wants to automate their process of data cleaning and save huge amount of time. Having some basic experience in Power Query is recommended. Table of Contents - Introducing M - Working with Power Query M - Accessing and Combining Data - Understanding Values and Expressions - Understanding Data Types - Structured Values - Conceptualizing M - Working with Nested Structures - Parameters and Custom Functions - Dealing with Dates, Times, and Durations - Comparers, Replacers, Combiners, and Splitters - Handling Errors and Debugging - Iteration and Recursion - Troublesome Data Patterns - Optimizing Performance - Enabling Extensions
