Advanced Power Query transformations

Advanced Power Query & M Language Tutorial | From Raw Files to a Clean, Validated Dataset Already know the basic transformations in Power Query and want to understand what happens behind the scenes? In this hands-on tutorial, we build a practical workflow from raw monthly CSV files to a clean dataset ready for reporting in Power BI. I show both the clicks in Power Query and the M code behind them. The practice data intentionally includes a missing Quantity, an invalid date, a negative Quantity, and unmatched customer and product IDs, so you can learn how to validate data instead of just cleaning it. Query Folding is not covered in this video and will come in a separate one. 💬 Which advanced Power Query topic should I cover next? Tell me in the comments. 👍 If this helped, like the video and subscribe for more Power Query, DAX and Power BI tutorials. #PowerQuery #MLanguage #PowerBI #DataCleaning #ExcelTips #DataAnalytics