LearnSQL.com

It said from A to Z. And the thing is, is not a joke at all. More than SQL 700 exercises. I sweat a lot with this one. 💪 LearnSQL.com

SQL is a programming language designed specifically to communicate with databases. It allows you to get the data from a database or change the data within it.   Like any programming language, SQL has a syntax you must adhere to. In other words, there are rules to follow regarding its commands if you want your code to work.   In today’s article, we’ll give you a walkthrough of core SQL syntax with a focus on the SELECT, WHERE, GROUP BY, HAVING and ORDER BY statements.

I am excited to share Part 2 of my series on applying LearnSQL.com’s Data Analyst Cheat Sheet. This article explores the Customers and Products domain using Tableau’s Superstore dataset, covering techniques like trend analysis, ranking, and segmentation. The post includes the same process as well:  SQL Techniques (Code) + Metric Patterns (Problem Type) + Cheat Sheet (Thought Process) Article 👉 https://lnkd.in/g7f8cHan Cheatsheet 👉 https://lnkd.in/giJyFsyZ Part 1 👉 https://lnkd.in/gmerQJJC I’d like to hear everyone’s thoughts and feedback on this series! #SQL #LearnSQL #CareerDevelopment #DataAnalysis #Interviews #Tableau #CheatSheet

15 Tricky Advanced SQL Interview Questions As an advanced SQL user, you need to be able to recognize and avoid traps that pop up in real-life problems. No wonder interviewers are simply obsessed with using tricky questions to test your knowledge! So, what better way to be prepared for that than knowing some of the most common trick questions? We cover some of them in this article. They include topics like: ✅Joining multiple tables ✅OUTER JOINs ✅LEFT JOIN ✅Self-join ✅GROUP BY multiple columns ✅HAVING ✅Different ways of using COUNT() ✅Correlated subquery ✅UNION and UNION ALL ✅NULLs Do these topics sound too easy to be tricky? Well, have a look at the questions and you’ll see this simplicity can be pretty deceptive. Read the article ➡️ https://lnkd.in/dGxJr5xc #SQLinterview #SQLJob #JobInterview

SQL Aggregate Functions Cheat Sheet Aggregate functions – including the sum, average, count, minimum value, and maximum value – are central to effective data analysis. You’ll often need to extract aggregates by group, and sometimes you’ll want to order or filter by aggregate. It’s all there in the SQL Aggregates Functions Cheat Sheet. This quick Cheat Sheet will help you gain confidence and skills in using SQL aggregates →  ➡️ https://lnkd.in/dMPQrEps #SQL #DataAnalysis #LearnSQL 

How to Install MySQL on Ubuntu? Do you want to know more about using MySQL on an Ubuntu system? Read this article to learn how to install MySQL on Ubuntu fast ➡️ https://lnkd.in/duDZjKQk #ubuntu #mysql #InstallMySQL

Are your SQL queries slow? Learn how indexes can improve SQL query performance. Check out our guide to SQL indexing best practices➡️ https://lnkd.in/dMNPKWjn #SQL #DataAnalysis #LearnSQL 

Combining SQL's data management prowess with R's analytical and visualization strengths can revolutionize how you approach data. Imagine simplifying your workflow while amplifying your ability to derive meaningful insights. SQL: Your go-to for organizing and managing data efficiently. R: Powers through statistical analysis, bringing data to life through visualizations. Learn how SQL and R complement each other, transforming your analysis process ➡️ https://lnkd.in/dgX8Hh5Y #SQL #DataAnalysis #LearnSQL