29 Apr 2024 LearnSQL.com Team 10 Correlated Subquery Exercises with Solutions Correlated subqueries are a powerful SQL feature essential for advanced data analysis. This article provides 10 practical exercises to help you master correlated subqueries. SQL is a fundamental skill for anyone working with data, whether as a data analyst, a SQL developer, a data engineer, or any other related profession. Mastering SQL involves more than just understanding the basics. It also requires learning advanced SQL features, such as subqueries. Read more 27 Apr 2024 LearnSQL.com Team New Monthly SQL Practice for May 2024! Ready for our new SQL challenge? This time, the tasks are slightly more difficult. In this course, you will assist Jason in analyzing the employee hierarchy at his company using common table expressions and recursive queries. Welcome to the May SQL Practice course! In our May 2024 SQL Practice, you will meet Jason. He owns a company that makes riding lawn mowers. He needs HR insight into the employees at his company and has hired you as an SQL specialist to help him out. Read more 10 Apr 2024 LearnSQL.com Team Your Guide to SQL Practice at LearnSQL.com Explore a variety of SQL practice opportunities at LearnSQL.com and take your data analysis skills to the next level. Whether you're a beginner or an advanced user, our learning resources are designed to help you master SQL through hands-on learning and real-world usage scenarios. SQL, or Structured Query Language, is a powerful tool used extensively in data analysis. It allows you to access and manipulate databases quickly and efficiently. Whether you are working in finance, healthcare, tech, or almost any other industry, SQL helps you extract and analyze data. Read more 8 Apr 2024 LearnSQL.com Team Does Data Analytics Require Coding Thinking about a future in data analytics? You might be pondering the need for coding skills. Is it necessary to be good at programming? As the worlds of data analytics, technology, and data science merge, the importance of coding becomes clearer. It’s crucial to understand which programming languages are key and how much expertise you need, making the journey into this vibrant field less daunting. In this article, we're going to focus on the importance of coding, particularly SQL, for data analytics. Read more 31 Mar 2024 LearnSQL.com Team New Monthly SQL Practice for April 2024! In our April 2024 SQL Practice, you’ll meet Damien who manages a local art museum. He needs you to extract and present him with information to promote the museum. Will you use your SQL skills to help him? It should not be too hard if you have finished our SQL Basics course or otherwise understand core SQL concepts. Our interactive SQL course is a great way to test your skills and put what you have learned so far into practice. Read more 27 Feb 2024 LearnSQL.com Team New Monthly SQL Practice for March 2024! Ready for our new SQL challenge? This time, we have prepared slightly more difficult SQL tasks. Here’s the March SQL Practice course! This time, you will help Lilia who runs a genetic testing clinic. She needs insight into the performance of her clinic for February 2024 and has hired you as an SQL specialist to help her out. Can you identify the most popular tests? Can you create a report on patient preferences by age? Read more 21 Feb 2024 LearnSQL.com Team 4th Anniversary of LearnSQL.com Time runs so fast. This week, we celebrate the 4th anniversary of LearnSQL.com. We have come a long way together and we promise to get even better in the upcoming year! Thank you for being with us. 1459 days have passed since February 23, 2020, when we launched the LearnSQL.com platform. That's 35,016 hours, or 2,100,960 minutes, if you prefer. It's been a long time, but it feels like yesterday that we started out together. Read more 14 Feb 2024 LearnSQL.com Team PostgreSQL Cheat Sheet Here's your ultimate PostgreSQL cheat sheet! Whether you're a newbie or an experienced pro in need of a quick reference, this cheat sheet has got you covered. This PostgreSQL Cheat Sheet summarizes the key PostgreSQL commands and features you'll use often. It covers everything from how to connect to a PostgreSQL server and manage database contents, to the basic syntax for table creation and modification. It also breaks down the syntax for SELECT, INSERT, UPDATE, DELETE commands, and shows how to use different PostgreSQL functions, including text functions, numeric functions, NULL functions, and date and time functions. Read more 30 Jan 2024 LearnSQL.com Team New Monthly SQL Practice for February 2024! In our February 2024 SQL Practice, you will meet Andrew. He is the manager of a ski resort in Tirol and needs help to get important insights from the database of his resort. He wants to find out how customers rate different slopes at his resort, which reviews are the best and the worst for the slopes, which slopes are the least popular, etc. Will you use your SQL skills to help him? Read more 10 Jan 2024 LearnSQL.com Team 2024 Monthly SQL Practice: New Challenges Ready to boost your SQL skills in 2024? LearnSQL.com’s Monthly SQL Practice offers new courses and real-world exercises for all levels. Ready to elevate your SQL skills in 2024? LearnSQL.com’s Monthly SQL Practice returns this year with fresh, real-world exercises designed to keep your SQL sharp. Whether you're just starting out or already well-versed in SQL, our practice challenges offer a structured way to develop your expertise each month. With two new course releases—2023 Monthly SQL Practice Sets - Basic and 2023 Monthly SQL Practice Sets - Advanced—you'll have plenty of opportunities to refine your SQL knowledge this year. Read more «« « 1 2 3 … 6 » »»