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KNOWLEDGE HUB
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Power Query: Custom Function for Error Detection in Tables
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

MirVel
Jun 9, 20253 min read


Why Do Low-End Laptops Struggle with Large Excel & Power BI Data?
Ever tried opening a huge Excel file or running a complex Power BI report on a basic laptop, only to watch it crawl or freeze up? You’re not alone. Many of us have felt the frustration of our computer chugging like it’s stuck in molasses when handling big data. In this post, we’ll break down why this happens and what you can do about it. We’ll keep it casual and clear—no overly techy jargon—so you can understand the issues and find solutions without a headache. Let’s dive in

MirVel
May 28, 202520 min read


Power BI: Fun with DAX
Power BI's secret sauce is DAX (Data Analysis Expressions) – a formula language that lets you create dynamic calculations and advanced analytics in your reports. If you’ve ever used Excel formulas, DAX will feel familiar (think of it as Excel formulas on steroids!), but it’s built for Power BI’s relational data model and interactive visuals. In short, DAX empowers Power BI users to turn raw data into meaningful insights with custom calculations that go far beyond out-of-the

MirVel
May 22, 202524 min read


Excel Dynamic Array Functions: Unlocking a New Dimension
Microsoft Excel has entered a new era with dynamic array functions – a set of powerful functions in Excel for Microsoft 365 (and Excel...

MirVel
May 22, 20255 min read


Power Query in Excel & Power BI: The Ultimate Data Transformer
Power Query is Microsoft’s powerhouse tool for data transformation and automation, built into Excel and Power BI. If you’ve ever spent hours copy-pasting and cleaning data manually (and let’s face it, most of us have), Power Query is here to save the day. This blog post will take a casual yet detailed dive into Power Query, its benefits, and how to use it, from basic to advanced scenarios. We’ll walk through practical examples with sales, trade, and technical data, including

MirVel
May 13, 202521 min read


Unlocking the Power of Excel Tables and Pivot Tables: A Beginner’s Guide
Working with data in Excel is easy and even fun once you learn about Tables and PivotTables . An Excel Table is just a range of data...

MirVel
May 11, 20257 min read
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