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  • Book Overview & Buying The Definitive Guide to Power Query (M)
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The Definitive Guide to Power Query (M)

The Definitive Guide to Power Query (M)

By : Greg Deckler, Rick de Groot, Melissa de Korte
4.8 (34)
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The Definitive Guide to Power Query (M)

The Definitive Guide to Power Query (M)

4.8 (34)
By: Greg Deckler, Rick de Groot, Melissa de Korte

Overview of this book

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. *Email sign-up and proof of purchase required
Table of Contents (19 chapters)
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17
Other Books You May Enjoy
18
Index

Common errors

As you encounter and handle errors in your Power Query workflows, it’s essential to review patterns and learn from them. Analyzing common errors and understanding their root cause can guide you in refining your error-handling approach. Therefore, this section focuses on some of the most common errors you are likely to encounter. Furthermore, it is helpful to understand that multiple errors can be encountered during debugging, and syntax errors will always be raised first as they make it impossible for the M (mashup) engine to parse the provided code.

Syntax errors

Syntax errors in an expression are typically identified during the code-writing phase. These errors indicate that there is an issue with the pattern or structure of the provided expression.

A missing comma on line 3 returns Expression.SyntaxError: Token ',' expected:

let
    A = 1,
    B = 0
    result = A / B
in
    result

An additional comma inside the list on line 2...

CONTINUE READING
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