In-depth Power BI, DAX, and Power Query tutorials for data analysts. From beginner basics to advanced time intelligence, learn to build better dashboards.https://powerbitutorials.com/en-ushttps://powerbitutorials.com/tutorials/conditional-formatting-power-bi/https://powerbitutorials.com/tutorials/conditional-formatting-power-bi/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.Mon, 20 Jul 2026 00:00:00 GMTvisualizationPower BI Tutorials Teamhttps://powerbitutorials.com/tutorials/dax-troubleshooting-guide/https://powerbitutorials.com/tutorials/dax-troubleshooting-guide/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.Mon, 20 Jul 2026 00:00:00 GMTdaxPower BI Tutorials Teamhttps://powerbitutorials.com/tutorials/power-bi-common-mistakes-beginners/https://powerbitutorials.com/tutorials/power-bi-common-mistakes-beginners/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.Mon, 20 Jul 2026 00:00:00 GMTdaxPower BI Tutorials Teamhttps://powerbitutorials.com/tutorials/power-bi-dashboard-design-principles/https://powerbitutorials.com/tutorials/power-bi-dashboard-design-principles/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.Mon, 20 Jul 2026 00:00:00 GMTvisualizationPower BI Tutorials Teamhttps://powerbitutorials.com/tutorials/power-bi-performance-optimization/https://powerbitutorials.com/tutorials/power-bi-performance-optimization/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.Mon, 20 Jul 2026 00:00:00 GMTdata-modelingPower BI Tutorials Teamhttps://powerbitutorials.com/tutorials/power-bi-sales-dashboard-tutorial/https://powerbitutorials.com/tutorials/power-bi-sales-dashboard-tutorial/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.Mon, 20 Jul 2026 00:00:00 GMTvisualizationPower BI Tutorials Teamhttps://powerbitutorials.com/tutorials/power-bi-tooltips-page-reports/https://powerbitutorials.com/tutorials/power-bi-tooltips-page-reports/Tooltips are the most underrated interaction in Power BI. A default tooltip shows the data point's values — useful but limited. Custom tooltip pages turn a hover into a mini-report: related metrics, trends, and context. This guide covers building both and the three patterns where tooltips shine.Mon, 20 Jul 2026 00:00:00 GMTvisualizationPower BI Tutorials Teamhttps://powerbitutorials.com/tutorials/sameperiodlastyear-comparison-patterns/https://powerbitutorials.com/tutorials/sameperiodlastyear-comparison-patterns/Year-over-year comparison is the most common business question in reporting. SAMEPERIODLASTYEAR is the simplest function for it, but it's just the start. This guide covers YoY, MoM, QoQ, and the custom comparison patterns for fiscal calendars and non-standard periods.Mon, 20 Jul 2026 00:00:00 GMTtime-intelligencePower BI Tutorials Teamhttps://powerbitutorials.com/tutorials/bookmarks-navigation-power-bi/https://powerbitutorials.com/tutorials/bookmarks-navigation-power-bi/Bookmarks capture the state of a report page — filters, selections, visibility, and sort order. Combined with buttons, they turn a static page into an interactive experience: tabbed navigation, drill-through stories, and self-guided report tours. This guide covers the mechanics and four patterns that work.Sun, 19 Jul 2026 00:00:00 GMTvisualizationPower BI Tutorials Teamhttps://powerbitutorials.com/tutorials/power-query-common-transformations/https://powerbitutorials.com/tutorials/power-query-common-transformations/Power Query has hundreds of functions, but a small set covers the vast majority of real-world cleanup tasks. This guide walks through ten transformations that handle messy exports, inconsistent naming, and malformed data — the daily reality of every data analyst.Sun, 19 Jul 2026 00:00:00 GMTpower-queryPower BI Tutorials Teamhttps://powerbitutorials.com/tutorials/rolling-averages-moving-sums-dax/https://powerbitutorials.com/tutorials/rolling-averages-moving-sums-dax/Daily data is noisy — a slow Tuesday followed by a spike Wednesday. Rolling averages and moving sums reveal the trend underneath. This guide covers the 7-day rolling average, the 30-day moving sum, and the pattern for any custom rolling window using DAX window functions.Sun, 19 Jul 2026 00:00:00 GMTtime-intelligencePower BI Tutorials Teamhttps://powerbitutorials.com/tutorials/power-bi-visual-types-guide/https://powerbitutorials.com/tutorials/power-bi-visual-types-guide/Power BI offers dozens of visual types, but most reports use the same handful. This guide covers the core visuals — bar, line, card, matrix, map, and scatter — with guidance on when each is appropriate, common mistakes, and the visual hierarchy that makes reports readable.Sat, 18 Jul 2026 00:00:00 GMTvisualizationPower BI Tutorials Teamhttps://powerbitutorials.com/tutorials/power-query-parameters-dynamic-sources/https://powerbitutorials.com/tutorials/power-query-parameters-dynamic-sources/Parameters let you control Power Query behavior without editing the M code — swap environments, change date ranges, or toggle between production and test data with a dropdown. This guide covers creating parameters, using them in queries, and the pattern for environment switching.Sat, 18 Jul 2026 00:00:00 GMTpower-queryPower BI Tutorials Teamhttps://powerbitutorials.com/tutorials/merge-vs-append-queries/https://powerbitutorials.com/tutorials/merge-vs-append-queries/Merge and append are the two ways to combine tables in Power Query, and they do completely different things. Merge is a SQL-style join — it adds columns. Append is a union — it stacks rows. This guide covers the difference, the join types, and the performance implications of each.Fri, 17 Jul 2026 00:00:00 GMTpower-queryPower BI Tutorials Teamhttps://powerbitutorials.com/tutorials/calculated-tables-what-if-parameters/https://powerbitutorials.com/tutorials/calculated-tables-what-if-parameters/Calculated tables let you build tables with DAX instead of loading them from a source. What-if parameters turn static assumptions into interactive slicers. This guide covers both features, the syntax, and five practical patterns — from date tables to scenario analysis.Thu, 16 Jul 2026 00:00:00 GMTdata-modelingPower BI Tutorials Teamhttps://powerbitutorials.com/tutorials/power-query-m-language-basics/https://powerbitutorials.com/tutorials/power-query-m-language-basics/M is the functional language behind Power Query. It looks nothing like DAX or Excel formulas, but once you understand its three core data structures and how functions compose, the editor becomes far less intimidating. This guide covers the fundamentals with practical examples.Thu, 16 Jul 2026 00:00:00 GMTpower-queryPower BI Tutorials Teamhttps://powerbitutorials.com/tutorials/dax-variables-best-practices/https://powerbitutorials.com/tutorials/dax-variables-best-practices/Variables in DAX do more than make code readable — they cache intermediate results, prevent repeated calculation, and make complex logic testable. This guide covers the syntax, the performance benefit, and five patterns where variables transform unreadable measures into maintainable code.Wed, 15 Jul 2026 00:00:00 GMTdaxPower BI Tutorials Teamhttps://powerbitutorials.com/tutorials/sumx-vs-sum-iterators/https://powerbitutorials.com/tutorials/sumx-vs-sum-iterators/SUM is simple and fast. SUMX is flexible and powerful. Choosing the wrong one leads to incorrect totals or bloated models. This guide covers the difference, when each is appropriate, and the three patterns where SUMX is the only correct choice.Tue, 14 Jul 2026 00:00:00 GMTdaxPower BI Tutorials Teamhttps://powerbitutorials.com/tutorials/bidirectional-filtering-guide/https://powerbitutorials.com/tutorials/bidirectional-filtering-guide/Bidirectional filtering is powerful and dangerous. It solves certain modeling problems elegantly — and creates performance disasters and ambiguous filter paths when overused. This guide covers what bidirectional filtering does, the three scenarios where it's the right tool, and the warning signs that you're using it wrong.Mon, 13 Jul 2026 00:00:00 GMTdata-modelingPower BI Tutorials Teamhttps://powerbitutorials.com/tutorials/data-modeling-star-schema/https://powerbitutorials.com/tutorials/data-modeling-star-schema/A well-designed star schema makes DAX easier and reports faster. Learn fact vs. dimension tables, relationship cardinality, and why bidirectional filters are usually a mistake.Mon, 13 Jul 2026 00:00:00 GMTdata-modelingPower BI Tutorials Teamhttps://powerbitutorials.com/tutorials/filter-context-row-context-explained/https://powerbitutorials.com/tutorials/filter-context-row-context-explained/Filter context and row context are the two evaluation contexts that govern every DAX formula. Most calculation errors trace back to confusing them. This guide breaks down both, shows how they interact, and gives you the mental model to predict formula behavior before you write it.Sun, 12 Jul 2026 00:00:00 GMTdaxPower BI Tutorials Teamhttps://powerbitutorials.com/tutorials/relationships-one-to-many-many-to-many/https://powerbitutorials.com/tutorials/relationships-one-to-many-many-to-many/Relationship cardinality determines how filters flow through your data model. One-to-many is the default and the safest choice. Many-to-many is sometimes necessary but introduces ambiguity and performance costs. This guide covers both, when each is appropriate, and the patterns that make many-to-many manageable.Sat, 11 Jul 2026 00:00:00 GMTdata-modelingPower BI Tutorials Teamhttps://powerbitutorials.com/tutorials/time-intelligence/https://powerbitutorials.com/tutorials/time-intelligence/Time intelligence is 80% of business reporting. Learn the calendar table setup, YTD/QTD/MTD functions, year-over-year comparison, and the rolling-average pattern every analyst needs.Mon, 06 Jul 2026 00:00:00 GMTtime-intelligencePower BI Tutorials Teamhttps://powerbitutorials.com/tutorials/power-query-getting-started/https://powerbitutorials.com/tutorials/power-query-getting-started/Power Query is the ETL engine behind Power BI. Learn to connect, transform, and shape data with a no-code interface plus a peek at the M language underneath.Mon, 29 Jun 2026 00:00:00 GMTpower-queryPower BI Tutorials Teamhttps://powerbitutorials.com/tutorials/calculate-function/https://powerbitutorials.com/tutorials/calculate-function/CALCULATE is the only function that can modify filter context. Master its syntax, evaluation order, and three real-world patterns that unlock every advanced DAX formula.Mon, 22 Jun 2026 00:00:00 GMTdaxPower BI Tutorials Teamhttps://powerbitutorials.com/tutorials/dax-basics/https://powerbitutorials.com/tutorials/dax-basics/Learn what DAX is, how measures differ from calculated columns, and write your first five formulas with confidence. A practical starting point for every Power BI analyst.Mon, 15 Jun 2026 00:00:00 GMTdaxPower BI Tutorials Team