[DAX] Lib - From Zero to Community Hero (with Jake Duddy)

LIVESTREAM DATE/TIME 📅

MAY 15TH 2026 (Pacific Time)

DESCRIPTION 📄

User-defined functions landed in DAX last September, and SQLBI launched DAXLib alongside them as a community repo for sharing libraries. There are already 30+ packages people can pull straight into their models. If you've built a UDF that made your own life easier, odds are someone else is working around the same problem.

This stream is about closing that gap. Jake Duddy joins me to walk through what it actually takes to turn a working UDF into a published DAXLib package that other people can install and use. Jake recently contributed EvaluationContext.Colour (a HEX manipulation library for SVG and conditional formatting work), so he's been through the workflow recently and has the bruises to show for it.

What we'll cover:

• DAXLib: what it is and why SQLBI built it

• Model-independent vs model-dependent functions, and which belong in a library

• Packaging a UDF for publication

• Submitting through GitHub

• What separates a useful contribution from noise

• Q&A throughout

GUEST BIO (Jake Duddy)👤

Jake Duddy is a Microsoft Data Platform MVP and Power BI SME based in Birmingham, UK. He runs the Evaluation Context blog covering Power BI, Fabric, DAX, and SSAS, and speaks regularly at SQLBits, the Power BI & Fabric Summit, and the Microsoft Data Platform Group Birmingham. Links to DAXLib, Jake's blog, and his EvaluationContext.Colour library are in the comments. #PowerBI #DAX #MicrosoftFabric #DAXLib #UDF

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Master DAX Foundations in Power BI: Calculations, Data Models & Filter Flow (Part 1)

Video by: Reid Havens

Start thinking in DAX instead of Excel. This interactive guide walks through everything you need to build a mental model for Power BI calculations: what DAX actually is, how measures differ from calculated columns, table and column references, star schema basics, and how filters flow from dimension to fact tables. Part 1 of a 3 part DAX Fundamentals series.

Topics covered:

• Excel formulas vs DAX: what changes and why

• Measures vs calculated columns: when to use each

• DAX syntax: table references, column references, and measure calls

• Star schema: fact tables, dimension tables, and relationships

• Filter flow: how slicers and relationships shape your results

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Next Generation Maps in Power BI with Icon Map (with James Dales)

LIVESTREAM DATE/TIME 📅

May 1st, 2026 - 9:30AM (Pacific Time)

DESCRIPTION 📄

Power BI mapping has… historically been “fine” in the way a rental car with three warning lights is “fine.” In this session, James Dales (Microsoft Data Platform MVP, co-leader of the London Fabric & Power BI User Group, and creator of Icon Map) walks through what’s new in modern mapping for Power BI and why Icon Map has evolved into a premium visual.

We’ll cover:

• Why Icon Map is now paid and what it delivers over legacy Icon Map and Azure Maps

• Icon Map Pro vs Icon Map Slicer: what each one does and when to use them

• The Icon Map Catalog and how it changes map-building workflows in Power BI

• Best practices for building clearer, faster, more interactive geospatial reporting experiences

Whether you’re building operational dashboards, location intelligence reports, or real-time analytics, you’ll leave with practical guidance on how to level up your maps without making your report behave like a slideshow.

GUEST BIO 👤

Having previously led the Power BI and Microsoft Fabric capabilities at both UK and global level for a large multi-national Microsoft consultancy, in 2024 James co-founded an ambitious geospatial data company Tekantis, to focus on geospatial analytics and data products.

James is a Microsoft Data Platform MVP and is the co-leader of the London Fabric and Power BI user group. In 2019 he became the first member of the Power BI Contributors Program, working alongside the Microsoft engineering team to build new functionality into the Power BI product codebase. He has a keen interest in geospatial and real-time analytics and is the author of the Icon Map visuals for Power BI.

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Writeback with Fabric Planning: What It Is, Why It Matters, and How to Get Started (with Gopal)

LIVESTREAM DATE/TIME 📅

April 17th, 2026 (9:30 AM - Pacific Time)

DESCRIPTION 📄

Writeback is one of the most requested capabilities in the Power BI community. It is now native in Microsoft Fabric with the newly announced Fabric Plan Item in Fabric IQ

In this session, Gopal Krishnamurthy and Reid Havens break down exactly how writeback works natively in Fabric Planning, including:

• how business users can create report and enterprise planning apps on top of semantic models

• how other stakeholders can collaborate and enter plan, forecast data

• how those inputs are written back to Fabric SQL

• how organizations can govern the data management process with PowerTable’s Live writeback and

• how you can do variance commentaries and commentary writeback with intelligence sheets

Whether you're an FP&A or Ops team tired of budget spreadsheets or a BI developer who's been asked to build an enterprise planning solution, this session gives you the full picture - live, in Fabric.

GUEST BIO (Gopal Krishnamurthy)👤

Gopal Krishnamurthy is a data and analytics entrepreneur who has been building companies in the space since 2010. He made two career-defining bets: first, pivoting from SAP consulting to cloud data platforms (Snowflake, Databricks, Power BI) in 2017, which led to his consulting business being acquired by Atos in 2021. Second, betting that future enterprise applications would need to be built natively on top of cloud data platforms, which became the foundation for Lumel.

Today Lumel serves over 3,000 organizations with 400+ employees, is fully bootstrapped from the proceeds of that first exit, and is the #1 Microsoft Power BI AppSource Partner. The company is building a full-stack Enterprise Performance Management suite (planning, BI, and data management) natively on Microsoft Fabric, and was recognized as Best Overall Vendor for EPM by BPM Partners in 2025.

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