That’s what big companies rely on: that’s why you should learn SQL in 2023.

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Why is it so important to be able to work with SQL databases in 2023? That’s easy to explain. Whether it’s Microsoft, Accenture, or Dell; corporations all over the world rely on the programming language SQL, because it is especially important for databases.

These days, it is difficult to conceive of a world without data. The amount of data collected is expected to increase by about 27 percent annually until 2025. This collected data is stored in databases for use.

However, stored data alone is useless if this data is not also managed and sorted. The most commonly-used database is the relational database, which uses SQL as a language. We will go into this in more detail in the next section.

What is SQL?

SQL stands for Structured Query Language. SQL makes it possible to query large amounts of data with relatively simple commands. This ensures the language is still very popular with companies.

Another advantage of SQL is that the syntax, i.e. its command structure, is relatively simple and the commands are strongly based on English colloquial language, which makes them intuitive. In addition, SQL can be used across platforms with many different database systems, as most modern databases have SQL interfaces.

NoSQL is also often mentioned in connection with SQL. One programming language is used for relational (SQL) and the other for non-relational (NoSQL) databases. Although both options are viable, there are important differences between the two programming languages.

SQL databases use a structured query language and have a predefined schema. They are also organized in tables, whereas NoSQL databases are document, key-value, graph or wide-column stores.

What is a relational database?

Relational databases consist of tables and are most similar in structure to an Excel spreadsheet. In a relational database, the data is sorted with a specific characteristic per column, for example, customer number, name or address. A row in this table always represents one customer only.

A key characteristic such as a customer number can be used to link data from different tables. Relational databases are the most commonly-used databases because, especially in a business context, data can be presented very effectively in tabular form in order to analyze it and gain insights.

What do I need SQL for?

SQL is used in all areas in which large amounts of data are generated. Many everyday applications use SQL, whether you’re using an app to manage your finances or downloading songs through a music streaming service. In cases like these, SQL is used to manage and sort the volumes of data in the background.

SQL can easily handle immense amounts of data. Even the smallest businesses manage and use huge amounts of data these days. The ability to process this data effectively and present it in an easily digestible way is therefore indispensable.

So why not use Excel? SQL is a far more powerful and faster way to process large data sets.  Every department within a company uses data in its own way.

If you work in marketing, you need data to identify customer needs and to understand whether your marketing campaigns are performing well. In production, you need data to monitor and avoid bottlenecks, and management needs data to make the right strategic decisions for the company.

Being able to work with data, for example with SQL, is therefore one of the most important skills today. It cannot be understated how important data literacy is today and how much your career can benefit from it.

Why is it worth learning SQL?

Although SQL skills can open many doors for you in your current job, they can also enable you to jump into a new career. With SQL skills, many different roles are on the horizon for you. For example, you can work as a database developer, SQL administrator or SQL developer.

Pictured is a developer working with an SQL database. SQL simplifies the management of relational databases.
The salary range for an SQL developer goes from 41,400 euros to 64,500 euros per year.

Career changers are always desperately sought in these professions, which once again shows how sought-after SQL skills are among employers. All of these jobs offer good pay. On average, an SQL developer earns between € 41,400 per year for beginners and € 64,500 per year for experienced developers. SQL doesn’t only help you find a new well-paid job, however.

Even though tech jobs pay well, you may want to explore the career options that SQL can improve in your current job. We’ve already explained above why SQL is needed in almost every department.

SQL skills are an extremely valuable qualification for anyone, both within a company and when changing jobs. If you choose to learn SQL, your time is well spent and you should expect a high return on investment. So if you add this useful skill to your CV, you will create opportunities for promotion both within your own company and with other companies.

How do I learn SQL?

There are many different ways to learn the database language of SQL. If you prefer traditional learning methods, there are many different SQL reference books designed to explain the basics of SQL and warn you of common pitfalls.

There is also no shortage of digital SQL learning opportunities today. There are now many different online SQL training options that can teach you the basics of SQL in a relatively short time. However, you should focus on quality!  Free SQL courses and boot camps do not always offer the quality and depth of information that is especially important for beginners. That’s why your focus should be on a solid basic education, which you can then build on independently if necessary.

Baner in SQL databases blog: " Learn sql on Germany's most innovative learning platform".

At StackFuel, you will not only receive theoretical training, you will learn hands-on in our virtual programming environment, be supervised by experienced mentors and developers, and we will certify your skills with a recognized certificate of completion, which is especially important if you are pursuing career plans with SQL.

StackFuels SQL Bootcamp 2023

With our SQL training, we offer you the opportunity to bring your skills to a level that will enable you to use SQL in your profession and take on a career as a developer in a very short time. Our training is aimed at those who want to learn SQL quickly and practically from experts.

The training lasts around 32 hours and is divided into 4 chapters, which consist of videos, info texts, quizzes and practical projects. In addition, you will be supported throughout your training by our dedicated mentoring team, who will respond to your individual needs and questions and ensure your learning success.

Want to find out more? Then simply visit our course page or let us advise you personally and without obligation.

Would you like to learn more about SQL databases, data science, Python, etc.? Then take a look at our social media channels to make sure you don't miss anything.


Dev Insider (2019: “Was ist SQL? ” [21.04.2022]

Bitkom (2014) “Big-Data-Technologien – Wissen für Entscheider” [21.04.2022]

DataScientest (2021) “SQL – Alles über die Datenbanksprache” [21.04.2022]

Der Informationsdienst des Instituts der deutschen Wirtschaft (2019) “Datenmenge explodiert

Integrate (2021): “SQL vs NoSQL: 5 Critical Differences” [21.04.2022]

Louisa Krützfeldt
Louisa Krützfeldt
Louisa is a Berlin native and Junior Data Scientist at StackFuel. She studied biochemistry in her hometown and bioinformatics in nearby Potsdam. After graduating, she worked in medical research, where she was particularly involved in analyzing medical data to research cancer prognosis in children. Analyzing the vast amounts of data was very valuable to Louisa and she fondly remembers the feeling when she was able to extract relevant, actionable information from the data. Louisa wants to bring this valuable skill and her excitement for data analysis to learners at StackFuel and make it a fun experience.

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