Dirty data does not announce itself. It arrives quietly as blank cells, "N/A" placeholders, stray zeros, or entirely empty columns that looked fine in the source system. Left untreated, these inconsistencies silently corrupt your totals, break your relationships, and cause scheduled refreshes to fail at the worst possible moment. This guide shows you how to stop patching issues one column at a time and build a small library of reusable M functions that handle every table inco

When you're transforming data in Power BI or Excel using Power Query, you're bound to run into errors —mismatched data types, division by text, nulls, you name it. But instead of manually inspecting row by row, why not automate error detection with a custom Power Query function ? Check out some of our FREE templates and materials. PRACTICE MATERIAL BELOW!👇 In this blog post, I’ll walk you through a clean method to catch and analyze all row-level errors using Power Query. Th