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KNOWLEDGE HUB
Practical explanations for better data work
Articles on Excel, Power BI, Power Query, dashboards, and automation—kept focused enough to use in your next project.


Dynamic File Path Handling in Excel & Power BI
Hook: Hard-coded paths are silent project killers. Move a file, share a workbook, or publish a PBIX—and boom: refresh fails. Goal: In ~10 minutes you’ll set up robust, parameter-driven paths for Excel (Power Query) and Power BI (Desktop & Service), plus a tiny, reusable M pattern you can paste into any project. PRACTICE MATERIAL BELOW!👇 1) Why hard-coded paths fail When you embed "C:\Users\Alice\Project\data.csv" in a query, anyone whose files live elsewhere (e.g., D:\Work\

MirVel
Oct 22, 20254 min read


Automating Invoice Processing with Power Automate AI Flows
Processing invoices is one of the most common but also one of the most time-consuming tasks in any finance or business department. Manually typing invoice numbers, vendor names, or due dates into an ERP or Excel sheet not only takes time but is also error-prone. With Power Automate and AI Builder, you can automate this process: invoices get uploaded (or even received by email), an AI model extracts key information, and the results can be sent by email or stored in your system

MirVel
Oct 12, 20255 min read


External Tools in Power BI: A Deep Dive into the Essential Add‑Ons and Their Trade‑offs
Microsoft Power BI Desktop contains a rich set of modelling and reporting features, yet many power users enhance their workflow with external tools. These tools attach to the Analysis Services instance behind a PBIX/Power BI semantic model and allow advanced editing, scripting, performance analysis and automation. The External Tools ribbon lists all registered tools, and Microsoft warns that these are produced by independent developers; editing metadata outside Power BI Deskt

MirVel
Oct 5, 202510 min read


Power BI: Relationships in Models – The Ultimate Guide
Introduction Building effective Power BI reports is not just about loading data and creating visuals—it’s about structuring your data model correctly. Relationships are at the heart of that structure. In this post, we’ll explore what relationships in Power BI are, why they matter, how to create and manage them, and some advanced tricks to avoid common pitfalls. PRACTICE MATERIAL BELOW!👇 Understanding Relationships in Power BI Relationships define how tables connect with eac

MirVel
Sep 28, 20253 min read


Mastering the CALCULATE Function in Power BI: A Step-by-Step Guide
If you're a moderately experienced Power BI user, you’ve likely encountered the CALCULATE function in DAX (Data Analysis Expressions). This is one of the most powerful and essential functions in the DAX language because it allows you to modify the context in which data is filtered and calculated. In this post, we’ll break down the structure of CALCULATE, walk through practical examples, explore advanced use cases, and show you how it can elevate your Power BI reporting. PRACT

MirVel
Sep 22, 20253 min read


Famously Excel Functions: INDEX and MATCH – Usage, Best Examples, and Tips & Tricks
Excel users often seek efficient ways to retrieve data from large spreadsheets. Two powerful functions that stand out in this pursuit are...

MirVel
Sep 21, 20253 min read
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