What is Power BI? A Complete Beginner’s Guide to Features, DAX & Uses (2026) If you work with data — or you want to — you’ve probably heard the name Power BI at least once. Maybe your manager mentioned it. Maybe you saw it on a job description. Or maybe you’re just curious about what all the fuss is about. Well, you’re in the right place. In this guide, we’re going to cover everything you need to know about Power BI — what it is, what it does, how to install it, how it compares to Excel, and how to write your first DAX formula. Whether you’re a complete beginner or someone who has used Excel for years, this guide is for you. Let’s get started! What is Power BI? Power BI is a business intelligence and data visualization tool developed by Microsoft. In simple words, it helps you take raw data — from Excel files, databases, websites, or apps — and turn it into beautiful, interactive reports and dashboards Instead of staring at boring rows and columns in a spreadsheet, Power BI lets y...
Best Websites to Practice SQL for Free in 2025 SQL (Structured Query Language) is one of the most important skills for anyone interested in software development, data analysis, backend development, or data science. Whether you're preparing for job interviews or learning SQL for college, practicing regularly is the key to mastering it. The good news? You don’t need to spend money—there are many free platforms where you can learn and practice SQL hands-on. In this blog post, I’ve listed the top 10 websites to practice SQL for free in 2025 , along with what makes each one special. Let’s get started! 1. W3Schools SQL W3Schools is one of the simplest and most beginner-friendly websites. It offers clear explanations, examples, and a built-in editor called “Try It Yourself.” Why it’s great Easy explanations for beginners Instant practice environment Covers basic to intermediate SQL concepts Best for: Students & complete beginners 2. SQLBolt SQLBolt is a step-by-step tuto...