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Articles
Cookbook
30 Nov 2023
Maria Durkin
SQL for Data Analysis: 15 Practical Exercises with Solutions
Are you new to the world of SQL and eager to unlock the power of data analysis?. In this article, we'll improve our SQL skills through 15 practical, hands-on exercises designed specifically for beginners. Because when it comes to SQL, practice truly makes perfect! We’re going to shine a spotlight on the critical domain of data analysis, where SQL takes center stage. SQL, or Structured Query Language, plays a pivotal role in data analysis.
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29 Nov 2023
LearnSQL.com Team
New Monthly SQL Practice for December 2023!
In our December 2023 SQL Practice, you’ll meet John. He manages a website specializing in cooking recipes, tutorials, and articles. John needs you to extract and present information to help with further development of the website. 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've learned so far into practice.
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28 Nov 2023
Tihomir Babic
What Are SQL Window Functions?
Need to up your data analysis game? Learn these SQL window functions here and you’ll take your analysis skills to the next level. Practice exercises and detailed explanations included! When I first heard about SQL window functions, I thought it was some strange marriage between SQL and Windows. I was wrong. The SQL window functions have nothing to do with that famous operating system. They are SQL functions that do computations on the set of rows related to the current row.
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23 Nov 2023
Alexandre Bruffa
The Best SQL Practice Challenges for Beginners
Want to get better at SQL? Dive into SQL practice challenges! They're a great way to learn and improve. In this article, we'll explore why these challenges are important and where you can find the best ones. Are you a student, a business owner, or an employee? If data is part of your work and you want to learn SQL to manage it, you’ll need to practice. And interactive SQL challenges are ideal for beginners to get comfortable with the language.
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21 Nov 2023
Maria Durkin
SQL Aggregate Functions: A Comprehensive Guide for Beginners
Are you curious about SQL aggregate functions and how they apply to real-world scenarios? In this article, we'll explore SQL aggregate functions, showcase real-world examples, and offer valuable insights on how to master them. Data aggregation is the process of taking several rows of data and condensing them into a single result or summary. When dealing with large datasets, this is invaluable because it allows you to extract relevant insights without having to scrutinize each individual data point.
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16 Nov 2023
Ignacio L. Bisso
10 GROUP BY SQL Practice Exercises with Solutions
Need to practice your SQL skills? These 10 GROUP BY practice exercises – with explanations and solutions – are a great start! GROUP BY is a powerful SQL clause that allows you to create groups of records and then calculate summary metrics (such as averages) for those groups. However, GROUP BY is often challenging for SQL learners to master. Yet, practicing GROUP BY is very important if you’re planning on using SQL.
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14 Nov 2023
Jakub Romanowski
SQL for Human Resources
Data is just as important in Human Resources as it is in other business areas. That makes SQL for HR more than just a tool; it's a game-changer. Let's dive into this transformative journey together. In the modern business world, data has become a cornerstone. It drives decisions, shapes strategies, and offers insights that were previously out of reach. Every corner of an organization, every department, is tapping into the potential of data to enhance its operations.
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9 Nov 2023
Alexandre Bruffa
SQL Practice for Students: 11 Exercises with Solutions
Calling all students! Are you SQL-curious? Want to learn or improve your SQL skills? This article has 11 SQL practice exercises with detailed solutions. Have you ever heard that “Practice makes perfect”? You probably have – that’s why you’re looking for SQL practice resources. If you want to develop strong skills or become an expert in a certain domain, you have to practice. As Rebecca McKeown wrote in her outstanding article Learning SQL?
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7 Nov 2023
Jill Thornhill
Why Every Database Administrator Needs SQL
What is a database administrator? What do they do? Why do they need to know SQL, and what do they use it for? In this article, I'll answer these questions. As technology advances, more and more data is available to help organizations make informed decisions. You can't stay competitive – or provide good service to your customers – without the right information. Database administrators are responsible for making sure the right data is stored safely, that it's easily accessible to those who need it, and that it’s protected from malicious attacks.
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2 Nov 2023
Maria Durkin
Where to Practice SQL
Are you looking to boost your data management or analytical abilities? Then you need to know how and where to practice SQL, the worldwide language for managing and running relational databases. Of course, knowing where to practice SQL can be a challenge – there are so many options! In this article, we’ll walk you through the best digital platforms for enhancing your SQL skills. SQL, or Structured Query Language, is the universal language for managing and operating relational databases.
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