In this writing, I’d like to share how I started to learn and create my own DAX UDF (User Defined Function) library , the pain points I’ve faced while trying to make the functions as general as possible, and how I plan to take the next steps forward. You can explore the project here: jihwankimdata/dax_udf_library How It Started Like many Power BI developers, I’ve written the same logic dozens of times — percentage growth, variance analysis, ranking, or window calculations — s

Introduction DAX User Defined Functions (UDFs) – introduced in the Power BI September 2025 release – let you encapsulate complex logic into named, parameterized functions that can be reused across measures and models. Power BI September 2025 Feature Summary | Microsoft Power BI Blog | Microsoft Power BI Unlike calculation groups, UDFs accept parameters and nest other functions, paving the way for cleaner, more maintainable semantic models. Enterprise scenario:  Let's assume,

In this writing, I’d like to share how I’ve been exploring TMDL (Tabular Model Definition Language)  since it was in preview — and why...

In this writing, I’d like to share how I started learning to edit semantic models directly in the Power BI service  and how TMDL (Tabular...

Why I Started Looking at Refresh Templates For years, I’ve learned and worked with refresh schedules in Power BI. At a small scale,...

In this writing, I’d like to share how I learn to navigate the evolving world of DAX. In an era dominated by AI and low-code solutions,...

I. Introduction: The All-Too-Common Incremental Refresh Headache In this writing, I’d like to share how I approach a frustratingly common...

In this writing, I’d like to share how I learned and understood one of the most important—and often overlooked—files I encountered as I...

In this writing, I'll share my experience handling a Power BI report connected live to a semantic model within a workspace integrated...

In this writing, I want to share one of my ways how I make learning DAX authoring more enjoyable. A great way I've found to start and to...