Introduction to M
Chris Webb · Apress eBooks · 2014
If you want to unlock the full potential of Power Query, you have to learn M. M is the unofficial name for Power Query’s formula language, and Power Query generates M code for each step in your query. The Power Query user interface also allows you to write your own M expressions in situations where you need more flexibility and control over what your query does. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.