Exploring Expression Functions in Power Query/ M

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When you look up the expression functions section in the Power Query formula language specifications, they are described as: functions that allow the construction and evaluation of M code.

There are only 3 M functions in this group:

  • Expression.Constant
  • Expression.Identifier
  • Expression.Evaluate

There are definitely real-world applications for them. Let's explore through examples what they do and how you can use them through this guide.

It introduces the various types of expression functions, detailing their syntax and potential use cases, facilitating a robust understanding of their application. It provides practical examples, demonstrating how these functions can be used to manipulate data, automate tasks, and enhance data analysis.

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