SQL Fundamentals Never Stop Being Useful

Used SQL Island for a quick brush-up on SQL 🎯 Simple, interactive, and a great way to revisit core concepts without the usual grind. Back to building 🚀 #SQL #DataAnalytics #Learning

🚀 Learning never stops! Currently exploring Advanced SQL concepts like Window Functions, CTEs, and complex joins—turning messy data problems into structured solutions. Getting better, one query at a time 💪 #SQL #DataAnalytics #LearningJourney

Day 15 of my SQL series Today I covered window functions using ROW_NUMBER. This allows us to rank data without grouping it — a very powerful concept in SQL. Next: RANK & DENSE_RANK #SQL #DataAnalytics #Learning #CareerGrowth

“Here is some basic SQL notes… saved for future me (and anyone else who needs it).” Because let’s be honest — we all learn SQL… and then forget the syntax the moment we actually need it 😅 So instead of pretending I’ll remember everything, I decided to document the basics: - Core queries - Filtering - Aggregations - Joins & more Nothing fancy. Just the stuff that actually gets used. Sometimes the smartest thing in tech isn’t knowing everything… it’s knowing where you saved it 😉 #SQL #DataAnalytics #DataScience #LearningInPublic #TechNotes

Solved a simple SQL problem today but learned a powerful concept Used left join to include all employees even those who did not get any bonus Then filtered for bonus less than 1000 or null Small problems but big clarity SQL is not about writing queries It is about thinking clearly Consistency over perfection #sql #dataanalytics #learning #beginners #growth #linkedinlearning

My First SQL Query Took 30 Minutes It was simple. But I had no idea what I was doing. Now it takes 2 minutes. The difference? Not intelligence. Just repetition. If you're learning SQL: You're not behind. You're exactly where you should be! #SQL #DataAnalytics #Learning

Your SQL Roadmap in one visual 🗺️ Navigating through Joins, Window Functions, and Aggregate Functions can be overwhelming when you're starting out. This chart breaks down exactly how commands like GROUP BY, JOIN, and RANK() fit into the bigger picture. Pro-tip: Mastering Window Functions is what separates a beginner from an intermediate analyst. What’s the hardest SQL concept you’ve tackled so far? #SQL #DataAnalysis #BigData #CareerGrowth #Learning #codebasics #powerbi

Window Functions in SQL always felt confusing to me — especially OVER(), PARTITION BY and ORDER BY. So I tried breaking it down in the simplest way possible. A detailed explanation on all window functions will be in the next post. Till then, happy learning 🚀 #SQL #DataEngineering #WindowFunctions #openfornewopportunity #datalearning

Day 27 of my SQL Night Learning Journey 🌙 Today, I learned about the SELECT INTO statement, and it made things feel a lot more practical. In simple terms, SELECT INTO helps you create a new table from an existing one while copying the data into it at the same time. Think of it like: “Take this table, duplicate it, and save it as a new one.” This is especially useful when: You want to create a backup of your data You need a temporary table to run the analysis without touching the original data One important thing I learned: The new table copies the columns and data types, but it does NOT automatically include things like: Primary keys Indexes NOT NULL constraints So it’s not a perfect clone, but it gets the job done for most use cases. A simple example that stood out to me: Creating a backup of a table by copying everything into a new one. Little by little, SQL is starting to feel less intimidating and more like a tool I can actually use 🛠️ #SQL #LearningInPublic #DataAnalytics #BeginnerFriendly #TechJourney #Consistency #WomenInTech

Most people try to learn SQL by memorizing everything… and end up overwhelmed. The truth is, you don’t need hundreds of commands. Just understanding a few core concepts can take you really far. I came across this visual that breaks down 20 essential SQL concepts — and honestly, if you focus on these, you’re already ahead of most beginners. If you're starting out, focus on: - SELECT & WHERE → getting and filtering data - JOIN → combining tables (this is where things click) - GROUP BY & HAVING → analyzing data Once you’re comfortable with these, everything else becomes much easier. Which SQL concept do you find the most confusing right now? #SQL #DataAnalytics #Learning #TechSkills #CareerGrowth