In this blog, I’m showing you some really useful tricks with the Combine and Expand features in Power Query. Most of us just click the built-in buttons to combine tables or expand lists and records, but if you look at the M code behind those steps, you’ll discover far more powerful ways to work with your data. I’ll walk you through different levels of using combine and expand, from the simple methods you already know, to more dynamic approaches that won’t break when column names change, and even advanced tricks like repeating rows or expanding multiple lists together. Once you understand what’s really happening behind the button, you can make your queries more flexible, more robust, and much easier to maintain.
