Sql Practice

Martyna Sławińska

SQL Practice: 11 SQL Window Functions Practice Exercises with Detailed Solutions

In this article, we present 11 practice exercises involving SQL window functions, along with solutions and detailed explanations. SQL window functions are a powerful feature that lets us extract meaningful insights from our data easily, yet few SQL courses offer SQL window functions exercises. This makes practicing window functions quite difficult. In this article, we’ll give you 11 practice exercises that feature window functions. All exercises shown in this article come from our interactive courses Window Functions and Window Functions Practice Set.

Tihomir Babic

SQL Joins: 12 Practice Questions with Detailed Answers

In this article, we dig into our SQL JOINS course and give you 12 join exercises to solve. But don’t worry – all the exercises have solutions and explanations. If you get stuck, help is there! This is, after all, made for practicing and learning.  SQL joins can be tricky. It’s not just the syntax, but also knowing what joins to use in what scenarios. Joins are used when combining data from two or more tables in SQL.

LearnSQL.com Team

Free Course of the Month – SQL Practice Set in PostgreSQL

Do you know the basics of PostgreSQL but still need some practice? Look no further! Here is a great interactive course, SQL Practice Set in PostgreSQL. Throughout the month of September, you have access to it for FREE! We at LearnSQL.com believe that to learn a new skill, you need basic theoretical knowledge and, above all, a lot of practice. It's the same with writing PostgreSQL queries – you need a lot of PostgreSQL practice.

Martyna Sławińska

Advanced SQL Practice: 10 SQL Practice Exercises with Solutions

As SQL proficiency continues to be in high demand for data professionals and developers alike, the importance of hands-on practice cannot be emphasized enough. Read on to delve into the world of advanced SQL and engage in practical exercises to enhance your skills. This article provides you with a collection of ten challenging SQL practice exercises specifically for those seeking to enhance their advanced SQL skills. The exercises cover a selection of SQL concepts and will help you refresh your advanced SQL knowledge.

Tihomir Babic

10 Beginner SQL Practice Exercises With Solutions

Solve these ten SQL practice problems and test where you stand with your SQL knowledge! This article is all about SQL practice. It’s the best way to learn SQL. We show you ten SQL practice exercises where you need to apply essential SQL concepts. If you’re an SQL rookie, no need to worry – these examples are for beginners. Use them as a practice or a way to learn new SQL concepts.

Jill Thornhill

How to Practice Advanced SQL Online

Want to go from intermediate to advanced SQL user? You’ll need to practice! Here are some ways you can practice advanced SQL online. You’ve seen how SQL helps you make data-driven decisions. Perhaps you’ve even learned some advanced features. But you’d like to become an expert—and for that, you need practice, practice, and more practice. Is it possible to get advanced SQL practice online? Taking SQL to the Next Level What is advanced SQL?

Tihomir Babic

How to Practice SQL Window Functions Online

Learn and practice SQL window functions from the comfort of your home! Here’s how to do it. The last few years have shown that working from home has many benefits over the daily  commute. No wonder people are reluctant to go back to the office! They have much more time while doing the same work. What do you do with the extra time? Whatever you want. It’s your time!

Ignacio L. Bisso

How to Practice SQL Subqueries

Have you ever wondered what separates beginners from advanced SQL users? It includes things like, for example, subqueries. In this article, I explain their importance and why you need to practice SQL subqueries to become an expert. What Is an SQL Subquery? SQL is an easy-to-learn language. However, there are certain complex features and techniques of the language that require practice. One of these features is the subquery, which adds great expressive power to the language and your projects.

Jakub Romanowski

New Window Functions Practice Set Is Here!

Have you learned the SQL window functions? Or maybe, you forgot when and how to use them correctly? Are you preparing for an advanced SQL job interview? You've come to the right place! This is the new Window Functions Practice Set. This is very good news for all SQL learners and database professionals who want to improve their skills. The LearnSQL.com Team is proud to present the new Window Functions Practice Set!

Kamila Ostrowska

Best Places to Practice SQL JOINs Online

You’ve just started your journey with SQL and you’re not sure what a JOIN is or where to use it. Don’t worry! In this article, you will find out what JOINs are and where you can practice them online. If you have just started learning SQL, you have a lot of topics to cover before you can call yourself a data professional. If you are serious about using SQL, you’ll have to understand JOIN – what it does, when you can use it, and what its different variants do.

LearnSQL.com Team

Free Course of The Month – SQL Practice Set in MS SQL Server

You have to train a lot to learn a new skill. It is the same with MS SQL Server. Do you want to write good SQL queries? Or maybe you are preparing for a job interview? You've come to the right place! Throughout October you will have access to our amazing hands-on MS SQL Server course for FREE! You probably just thought: “There must be a catch. Why would someone give away SQL courses for free?

Jakub Romanowski

Why Is the SQL Practice Set my Favorite Online Course?

My friends know that I cannot sit still. I always have to do something, read something, and learn new stuff. It's stronger than me. But I don't complain, because this approach has only helped me in my life. I have done a ton of different online courses, but the SQL Practice Set has proved to be the best so far. Find out why. Learning SQL was not easy for me.

Jakub Romanowski

New Basic SQL Practice Course on LearnSQL.com

Hey, did you hear that there’s a brand-new Basic SQL Practice course on LearnSQL.com? This is a great opportunity to refresh your SQL, write some queries, and take your analytical skills to the next level. We’re proud to introduce Basic SQL Practice: A Store! Where did the idea for this new SQL practice course come from? From our users! They’ve let us know that they need more hands-on SQL exercises at a beginner level.

LearnSQL.com Team

SQL Course of the Month – SQL Practice Set

Are you starting your adventure with SQL and looking for a place to practice your SQL queries? Or maybe you are preparing for a job interview? I have good news for you. Throughout May, you will have access to our amazing SQL practice course for FREE! Why is LearnSQL.com giving you a free SQL course? Every month, our users get the opportunity to take one of our great SQL courses for free.

Tihomir Babic

SQL JOIN Topics That Require Practice

Are you interested in learning how to join tables in SQL? Where do you start? Many JOIN topics require practice. In this article, we’ll explore these topics by writing codes to solve real-life situations. Hopefully, you will learn which JOIN topics require attention. To make it easier for you, the topics are divided into beginner, intermediate, and advanced. Joining two or more tables in SQL lifts data analysis to another level.

Jakub Romanowski

Where Can I Find Good Courses to Practice MS SQL Server?

You’ve got the basics of MS SQL Server. Where can you find practice exercises in this SQL dialect? You've started learning MS SQL Server. Maybe you've done a course, watched some YouTube tutorials, and feel pretty confident in your knowledge. What now? Let me tell you, you need to practice. Only by writing queries can you truly master SQL. In this article, I will show you where to find practice MS SQL Server exercises.

Timothy Edison

How Much SQL Practice Do You Need to Become a Pro?

Are you wondering how long it will take to learn and practice SQL before you can call yourself a pro? In this article, I will try to help you answer this question. Being a pro in SQL can mean many different things. Some people would say that being a professional is about mastery of advanced SQL, i.e. window functions or complex subqueries. For other people, being a professional means getting paid for your skills.

Kamila Ostrowska

How to Practice PostgreSQL Online

PostgreSQL is hot right now!If you want to join a community of people passionate about data, this open-source database system is something you need to try. Like everything we teach on LearnSQL.com, PostgreSQL requires practice. To profit from Postgres – as this dialect is sometimes called – you need to start with the basics. You can watch some tutorials on YouTube or read articles to get to know what a Database Management System (DBMS) is.

Kamila Ostrowska

How to Practice SQL with LearnSQL.com

Practicing new skills online needs motivation and self-discipline, but it’s worth it. We’re facing a difficult, uncertain time. On one hand, the COVID pandemic caused a lot of fear. What will happen in the future? Will I keep my job? Will we stay safe and healthy? On the other hand, COVID is giving us a lot of time. Working remotely, not having anything to do but stay home and… And what?

Tihomir Babic

How to Practice SQL Window Functions at Home

Are you looking for a way to maintain your knowledge of SQL window functions? What’s the best way to practice them at home? Here are some suggestions. Learning something new feels great, but it’s also arguably the easiest part of gaining knowledge. You’ve probably experienced that yourself. You struggle with learning an idea, and then you finally get it! There’s the feeling you’ve learned something. And then, very soon, you practically have to start all over again with the very same concepts.

Magdalena Wojtas

How to Practice SQL After a Video Course

When you're just starting to learn coding, the most obvious first step is to watch online video courses. They're one of the most popular ways to learn the basics of a new technology without investing a lot of time and money. But you need to do more than that to master the topic. What should be your next step? When someone asks me about how to start learning to code, I often recommend trying video tutorials first.

Emil Drkušić

How to Practice SQL JOINs

There is no better way to learn SQL joins than through practice. However, there will probably be obstacles along the way. I’ll cover some of these obstacles and give ideas for how to overcome them. While this article won’t turn you into SQL JOINs expert, it will show you how to become one. So, let’s start! Challenges When Practicing SQL JOINs It’s hard to answer “How do you master SQL JOINs?

Rebecca McKeown

Learning SQL? 12 Ways to Practice SQL Online

If you’re currently learning SQL, you may have found yourself knee-deep in reading material and may be wondering how on earth you can bridge the gap between book knowledge and real-life SQL application. In this article, we bring you 12 of the most effective ways to practice SQL online, taking you from a bookworm to a database butterfly in no time at all! All theory and no practice will make you a frustrated SQL user!

Jakub Romanowski

How to Practice SQL

Do you already know what SQL aggregation functions are, what JOINs are, and how “group by” is different than“order by”? Great, congratulations. But don't you think that in order to master SQL and be able to apply it, you need to practice? We advise you on how to practice SQL to prepare for a data analyst job interview or to simply boost your knowledge effectively. Because, as they say, SQL practice makes perfect.

Dorota Wdzięczna

New LearnSQL.com Online Practice – Solve Basic SQL Questions with the SQL Practice Set

If you’re looking to retrieve any kind of information from a database, you need to speak its language. But querying databases is an art—and it demands practice. That’s why we created our SQL practice set: a pack of SQL online practice exercises meant to help you master your skills. We spend a lot of time not only developing new courses but also speaking with our users and learning what they expect from SQL online practice exercises.