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Free Course of the Month – Window Functions Practice Set

Do you want to enhance your SQL skills and learn how to prepare complex SQL reports? Maybe you've learned SQL window functions but need a refresher. This month, our unique SQL course Window Functions Practice Set is completely free!

You're probably wondering ‘What's the catch?’. Why do we give something for free to our users? Well... we want to support people like you who are constantly striving to be better. SQL is our passion and we want to share it with others.

What's more, we choose our courses of the month so that each user, regardless of their level of advancement, will find something for themselves. This time it fell on practical exercises with SQL window functions, which is more advanced. If you are just starting your adventure with SQL, you should choose SQL Basics. This is our flagship interactive SQL course, which has already opened a career path for thousands of people around the world!

Going back to our SQL course of the month, you can learn a lot at no cost, so there's absolutely no risk. But there's so much to gain. Don't miss this chance to improve your skills.

Window Functions Practice Set

How can you get this free SQL course in August 2023?

  1. Create a free account or log in if you already have one.
  2. Start the course. You will have free access to its content until the end of the month.

What Are Window Functions in SQL?

SQL window functions are a powerful tool in SQL, giving users the ability to perform calculations across a set of rows related to the current row. Unlike aggregate functions, which return a single result per group of rows, window functions don't reduce the number of rows returned by the query. Instead, they return a value for each row, computed from the related rows defined by the window frame.

Window functions are incredibly versatile and can be used to solve a wide range of problems. For example, they can be used to calculate running sales totals, moving averages of stock prices, the highest and lowest sales per branch or salesperson, the n-th value in a list of values, and more. You can read about some examples in How SQL Window Functions Can Help Managers Decide Who Gets a Raise.

The power of window functions lies in their ability to perform complex calculations and provide detailed insights without collapsing the data into a single output row. They allow you to display individual rows and aggregate values simultaneously, making them a very powerful tool for creating complex reports. This is particularly useful in business scenarios where detailed, row-level information is as important as summarized data.

In daily work, especially for data analysts and database professionals, SQL window functions can significantly simplify the process of data analysis and reporting. They can help answer complex business questions that would be difficult to address using standard SQL queries.

Want to know more about window functions? Here are some resources that will be a good supplement to your practice:

By mastering window functions, you can write more efficient, simpler, and less error-prone SQL queries. You’ll make your data analysis tasks more manageable and your reports more insightful.

Why Practice SQL Window Functions?

From our own experience (and from thousands of user emails), we know that the market mostly lacks good practical window function exercises. The topic itself very rarely appears in online courses, and finding additional practice is almost impossible. We decided to fill this gap.

Window Functions Practice Set

If you think seriously about becoming a data analyst or any other kind of database expert, you have to master advanced SQL – which includes window functions. With our interactive course, you can do it in no time!

We understand that advanced SQL syntax can be challenging. However, we firmly believe in the power of practice. The more you engage with difficult topics, the better you become.

So, don't shy away from challenges. Embrace them, practice relentlessly, and master window functions. Remember, practice is not just about repetition—it's about refinement and improvement. By practicing, you're not just learning window functions; you're becoming an SQL expert.

What Will You Learn in This Course?

We have an awesome Window Functions interactive course; the Practice Set is an extension of this course. It has 100 brand-new interactive online window function exercises, which should take you around 20 hours to complete.

Window Functions

In this course, you will:

  • Review the syntax of SQL window functions.
  • Practice common window function usage.
  • Use window functions to:
    • Rank rows.
    • Find top elements.
    • Compute the difference (delta) between two rows.
    • Calculate running totals and moving averages.
    • Analyze time series data.

The course will help you practice writing realistic reports using SQL window functions. The syntax of window functions is complex and difficult to remember, so practice is key to mastering it and becoming comfortable with creating complex reports. And again, now it's totally free! Just log in and start learning!

Who Should Take This Course?

This course is an excellent fit for data analysts working with SQL databases. In the fast-paced world of data analysis, staying updated with the latest SQL functionalities is crucial. This course provides an interactive platform to practice these functions, enhancing your ability to handle intricate data manipulation tasks.

Window Functions Practice Set

Our Window Functions Practice Set is also perfect for programmers who wish to keep their SQL knowledge current. Coding often involves dealing with databases. Having a strong grasp of modern SQL, including window functions, can significantly improve your efficiency and effectiveness in handling data-related challenges.

Computer science students and anyone interested in modern SQL should also consider this course. SQL remains a cornerstone in the field of computer science; understanding its modern functionalities (such as window functions) can give you an edge in your studies or career.

Moreover, if you're someone who simply wants to practice SQL window functions, this course provides a unique opportunity to do so interactively, helping you master these functions through hands-on exercises.

But beware, this is not a course for complete novices or people who have never dealt with window functions. If that's you, start with the Window Functions online course and come back here for more practice.

Free SQL Course for August 2023: Window Functions Practice Set

Like all our courses at, this one is interactive. You'll practice writing SQL queries to solve exercises in your web browser. Our platform will run yourquery and verify your solution. You don't need to install anything on your computer, so you can start practicing right away.

And again, throughout August this course is free!

So, what are you waiting for? Start learning today and take your SQL skills to the next level with our Window Functions Practice Set!