26+ hands-on tutorials for data analysts. From your first DAX measure to advanced time intelligence patterns — clear explanations, real datasets, copy-paste code.
Hand-picked guides every analyst should read first.
DAX errors are notoriously unhelpful. This guide covers the 15 most common DAX errors — from blank results to wrong totals to circular dependencies — with exact before-and-after fixes you can copy-paste.
Every Power BI beginner makes the same mistakes. This guide covers the 10 most common errors — from data types to DAX context to dashboard design — with exact fixes you can apply today.
A good Power BI dashboard isn't just charts on a page — it's a designed experience. Learn 12 principles for building dashboards that users actually understand and act on, from layout to color to interaction design.
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Master the Data Analysis Expressions language.
Explore →ETL and data preparation in Power BI.
Explore →Star schema, relationships, and model design.
Explore →Build interactive reports and dashboards.
Explore →Date-based calculations and YTD/MTD patterns.
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Conditional formatting applies color rules to cells based on their values — background gradients, font colors, data bars, and icons. It turns a wall of numbers into an immediately readable visual. This guide covers the four formatting types, the rules for each, and the design principles that keep formatting helpful instead of overwhelming.
DAX errors are notoriously unhelpful. This guide covers the 15 most common DAX errors — from blank results to wrong totals to circular dependencies — with exact before-and-after fixes you can copy-paste.
Every Power BI beginner makes the same mistakes. This guide covers the 10 most common errors — from data types to DAX context to dashboard design — with exact fixes you can apply today.
A good Power BI dashboard isn't just charts on a page — it's a designed experience. Learn 12 principles for building dashboards that users actually understand and act on, from layout to color to interaction design.
Slow Power BI reports frustrate users and kill adoption. Learn the systematic approach to diagnosing and fixing performance issues — from Performance Analyzer to DAX optimization to model tuning.
Follow a real-world project from raw data to finished dashboard. Learn data import, Power Query cleaning, star schema modeling, DAX measures, and visual design — all in one walkthrough.
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