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've learned to dramatically accelerate one of the most common and repetitive tasks in Power BI...

In this writing, I’d like to share what I have learned from a recent Microsoft Fabric announcement that, in my opinion, is one of the...

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’d like to share how I am evolving my Power BI development process. For years, building semantic models has been a...

In this writing, I like to share how I learned understanding and writing OFFSET DAX function in Power BI. OFFSET function (DAX) - DAX |...

Introduction: A New Chapter in My Power BI Development Journey In this writing, I'd like to share my journey with a feature that has...

By Jihwan Kim In this writing, I like to share how I learned to tackle one of the more insightful business analyses – cohort analysis,...

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Introduction In this writing, I like to share how I learned to create three distinct storage patterns for Power BI semantic models—...

In this writing, I like to share how I learn to populate a clean Fabric Lakehouse —AdventureWorks— using nothing but Spark notebooks. 1...

In this writing, I like to share how I learned to leverage the VAR in DAX to improve both the performance and readability of my Power BI...

Why performance and data model bloat may be silently hurting Power BI developments. In this writing, I like to share how I learn to...

In this writing, I'd like to share how I started learning to configure stylePresets  in Power BI and why it’s an exciting breakthrough...