How can Power Query M formulas replace complex Excel formulas for ETL processes?

All answers to this question.

Stop what you are doing and learn Power Query immediately. Formulas like MID and FIND are "volatile" and "brittle"—they recalculate every time you change any cell, slowing down your sheet. Power Query (ETL) happens outside the grid. You can perform complex text splits, merges, and conditional logic using a GUI, and it writes the 'M' code for you. It is much more robust because it handles data types strictly, unlike the Excel grid which can be messy. The biggest advantage is that you can "Refresh" the data when the source file changes, and all your cleaning steps are reapplied automatically. It’s the closest thing to professional data engineering within Excel.

   Answered 2024-01-10 by Jennifer Adams

Is the "M" language similar to DAX, or will I have to learn a completely different syntax to get the most out of Power Query?

   Answered 2024-01-15 by Charles Wright

• Charles, they are quite different. DAX is for modeling and measures (like complex sums), while M is for transformation (cleaning data). M is a functional, case-sensitive language. It feels a bit like F# or Javascript. However, you don't need to be a coder to start; 90% of what you need can be done by clicking buttons in the Power Query editor.

     Commented 2024-10-22 by Richard Lewis

I transitioned my whole team to Power Query for our weekly audits. We went from 4 hours of manual formula fixing to a 10-second refresh button.

   Answered 2024-01-22 by Nancy King

• That’s an incredible ROI, Nancy. It really highlights how moving from "Formula" thinking to "Process" thinking via Power Query changes everything.

     Commented 2024-01-25 by Steven Hall