DAX / FORMULAS
DAX Troubleshooting Guide: Fix the 15 Most Common Errors
Fifteen DAX errors that look cryptic, from blank results to wrong totals to circular dependencies, with the exact fix for each.
PRACTICAL POWER BI LESSONS / 01
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DAX / FORMULAS
10 Power BI Mistakes Beginners Make (And the Fixes)
Ten errors nearly every beginner makes: data types, DAX context, dashboard layout. The fix for each, and why it happens.
CHART / DESIGN
Power BI Dashboard Design: 12 Principles That Work
Twelve principles for dashboards people actually act on: layout, colour, density, and the interactions that guide rather than distract.
RELATE / MODEL
Power BI Performance Optimization: Reports and DAX
Find the bottleneck before optimising: Performance Analyzer, then DAX, then the model. A diagnosis order that saves hours of guessing.
CHART / DESIGN
Build a Sales Dashboard in Power BI: End-to-End Tutorial
One project, end to end: import, clean in Power Query, model a star schema, write the measures, then design the dashboard.
TRANSFORM / CLEAN
Getting Started with Power Query in Power BI
New to Power Query? This beginner guide covers the editor, applied steps, common transformations, and why query folding matters for refresh performance.
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DAX Formulas
Master the Data Analysis Expressions language.
Explore →Power Query
ETL and data preparation in Power BI.
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Star schema, relationships, and model design.
Explore →Visualization
Build interactive reports and dashboards.
Explore →Time Intelligence
Date-based calculations and YTD/MTD patterns.
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Workspaces, gateways, deployment, and administration.
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Small utilities that run in your browser. No signup, nothing uploaded.
DAX Formatter & Linter
Paste a measure: formatted output, plus the patterns that quietly cost performance.
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Contiguous dates, ISO weeks and fiscal years — in DAX or Power Query.
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Pro, PPU or the mix most teams end up on. See the yearly total.
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Fresh from the editor — published weekly.
RELATE / MODEL
Calculation Groups: One Slicer for Every Time Grain
Replace twelve time-intelligence measures with one calculation group and a slicer. How to build one in Tabular Editor, and the traps that bite first.
DAX / FORMULAS
Fix: A Circular Dependency Was Detected in Power BI
Why Power BI refuses to compute a column that refers back to itself, the three shapes this error takes, and the fix for each — with working DAX.
PUBLISH / SHARE
Power BI Licensing: Free vs Pro vs PPU vs Fabric
Four licence types, one decision. What Free cannot do, when Pro is enough, and the headcount where Fabric capacity beats per-user pricing.
PUBLISH / SHARE
Scheduled Refresh Failed: Seven Causes and the Fix
Your refresh worked yesterday. Seven reasons it stopped, in the order worth checking — from gateway offline to a query that times out only under load.
DAX / FORMULAS
SUMMARIZE vs SUMMARIZECOLUMNS vs GROUPBY
Three DAX functions that all group rows, and only one is right for a given job. Where each one belongs, and the SUMMARIZE pattern that quietly misbehaves.
MEASURE / TIME
PREVIOUSMONTH vs DATEADD in DAX: Why They Disagree on the 31st
Both look like 'last month' but return different date sets on the 31st. When each is correct, and how to check which one your model needs.
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