13 Mar 2025 Jakub Romanowski How to Transition From Excel to SQL: A Data Analyst's Perspective If you work with data, chances are you’ve spent countless hours in Excel – filtering data, writing formulas, and dragging cells across columns. Excel is a great tool but, at some point, it starts to slow you down. Huge files crash. VLOOKUPs become a nightmare. PivotTable takes forever to update. That’s when SQL comes in. It’s like Excel’s powerful, more scalable sibling. And the best part? If you know Excel, you already understand many SQL concepts. Read more 3 Mar 2025 Jakub Romanowski Course of the Month: Window Functions in PostgreSQL Are you looking for the best way to master SQL window functions? Throughout March 2025, you can access the interactive course Window Functions in PostgreSQL for free. Boost your skills at no cost. Hurry, time is running out! Need a free PostgreSQL course on window functions? You've come to the right place! If you are reading this article, you probably know PostgreSQL is one of the most popular databases in the world. Read more 24 Feb 2025 Jakub Romanowski The Most Common PostgreSQL Commands: a Beginner's Guide PostgreSQL is more than just a database – it’s the trusted tool behind some of the most demanding data projects out there. From analyzing sales trends to powering apps with real-time data, PostgreSQL commands let you take control of your data with precision and speed. In this article, I’ll walk you through the most common PostgreSQL commands that beginners need to know. Did you know that PostgreSQL is one of the most loved databases out there? Read more 20 Feb 2025 Jakub Romanowski What Your Favorite SQL Query Says About You SQL isn’t just about crunching data: it’s a peek into how you tackle problems and think about the world. In this article, I’ll dig into the quirks and traits behind some of the most popular SQL queries. Let’s see which one feels like you! Ever caught yourself wondering what your go-to SQL queries reveal about your personality? Whether you're going deep into SELECT * or crafting complex CASE statements, every choice reflects a bit of who you are. Read more 4 Feb 2025 Jakub Romanowski How SQL can Make Your Life as an Accountant Easier SQL for accountants is a powerful tool that takes your work beyond the limits of Excel. If you’ve ever faced a giant spreadsheet that refuses to load or spent hours on repetitive tasks, SQL can make your life so much easier. Let’s be real: Excel is great, but there comes a point when it’s just not enough. If you’ve ever stared at a giant spreadsheet that takes forever to load, you’ll know what I mean. Read more 3 Feb 2025 Jakub Romanowski Free Course of the Month: Customer Behavior in MySQL Have you ever wondered how businesses really get to know their customers? It’s all about analyzing behavior and, if you’re working with MySQL, there’s an awesome free course on LearnSQL.com that shows you how to do just that. Let me tell you all about it! If you’ve got the basics of MySQL down and want to dig into customer behavior analysis, you’re in luck! LearnSQL.com has a free course this month just for you—Customer Behavior Analysis in MySQL. Read more 30 Jan 2025 Jakub Romanowski A Day in The Life of a Data-Driven Marketer Who Uses SQL If you’re in marketing and want to supercharge your campaigns, understanding SQL is a game-changer. It’s not just for techies—marketers can use SQL to pull detailed data, analyze performance, and make smarter decisions. Plus, SQL makes working with databases a breeze, helping you target the right audience and optimize your strategies. Marketing and databases might not seem like they go together, right? But let me tell you, they make a killer combo. Read more 14 Jan 2025 Jakub Romanowski How SQL and Data Visualization Drive Success: Insights From Scott Davis If you’re thinking about becoming a data analyst, one thing is clear: SQL is your golden ticket. Whether you’re crunching numbers, building dashboards, or connecting data tools like Tableau, SQL is everywhere. I’ve got a great interview with Scott Davis—a pro with years of experience—who shares exactly how SQL fits into his day-to-day workflow and what skills you need to make it in the data game. The demand for data analysts is booming right now. Read more 7 Jan 2025 Jakub Romanowski How Advanced SQL Skills Can Accelerate Your Data Analytics Career If you're feeling good about the basics of SQL and wondering what’s next, advanced SQL is where things get really exciting. This is where you go from just querying data to transforming it, cleaning messy datasets, and creating actionable insights that solve real business problems. Advanced SQL skills can help you level up your career, whether it’s landing a senior analyst role or becoming the go-to data expert on your team. Read more 2 Jan 2025 Jakub Romanowski SQL in 2025: What’s New And Why It Still Matters for Data Pros As we enter January 2025, data technologies continue to advance. AI, cloud computing, and big data are shaping the industry, but SQL (Structured Query Language) remains fundamental for managing and analyzing data effectively. With new technologies emerging all the time, you might wonder if SQL is still relevant. The answer is a definite yes. It remains as essential as ever. In this post, we’ll look at why SQL is still a must-have skill in 2025, explore the latest trends, and provide actionable tips on improving your SQL expertise. Read more «« « 1 2 3 … 12 » »»