Data cleaning techniques and functions

In this section, you will deepen your understanding of Power Query’s advanced features, unlocking a new realm of possibilities for efficient data transformation. We will delve into the intricacies of query folding, a process that translates high-level transformation requests into low-level SQL statements, optimizing query execution and minimizing memory usage. Additionally, we will explore techniques to further enhance the clarity and organization of your transformation process, ensuring your Power BI experience remains both streamlined and powerful.

Adding columns

Adding columns with calculated values enhances your dataset and enables you to derive new insights. This will be quite a common transformation, especially when looking to keep the original source column.

To note, this is a different way to add columns to your data from the method that was highlighted in Chapter 4, The Most Common Data Cleaning Operations, where we used...