Intro to SQL

Learn how to manage large datasets and analyze real data using the standard data management language.

of learning
Free tools

What you will learn

Visualize an existing database

Learn how to view the structure and contents of a database, including tables, columns, and relationships between data.

Extract records from a database

Discover how to extract specific data from a database using SQL queries, allowing you to filter and sort data according to your needs.

Learn to make SQL queries

Develop the skills needed to create complex queries and manipulate data in a variety of ways, giving you the power to extract insights and make informed decisions.

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Course lessons

Your turn

Complete a course, receive your certification

Join our free tech courses at Le Wagon. As you develop new skills, you'll also work towards an important milestone—a recognized certification. Complete the course, earn your certification, and stand out in your career path.

Intro to SQL
John Doe
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Learn with passionate experts

Sébastien Saunier
Sébastien Saunier
Software Engineer
Julie Montels
Julie Montels
Lead Data Engineer
Paul Mochkovitch
Paul Mochkovitch
VP Education
Elise Reichardt
Elise Reichardt
Airtable & Softr Consultant

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What is SQL?

SQL, short for Structured Query Language, is a powerful and popular programming language used for managing and manipulating data in relational database management systems. It encompasses a range of essential concepts and advanced techniques. SQL allows users to perform various operations on data stored in databases, from simple queries involving single table retrieval to complex tasks involving multiple tables and advanced SQL query techniques. With its basic syntax and common operators, SQL provides a foundational knowledge of database theory and is widely used in real-world applications. It is a crucial skill for professionals in business analysis, exploratory data analysis, mathematical theory and analysis, and statistical programming. SQL proficiency is especially valuable in the data science field, where it is employed to perform analysis tasks, work with real databases, and leverage advanced software tools.

Who should have SQL Skills?

SQL skills are highly important for various professionals across different domains. Digital marketers can benefit from learning SQL as it enables them to extract and analyze data from databases, gaining insights to optimize marketing campaigns. Software developers should consider learning SQL to effectively work with relational databases and build database-driven applications. Business analysts and data analysts can enhance their analytical capabilities by mastering SQL, enabling them to retrieve and manipulate data for valuable insights and informed decision-making. SQL skills open up a world of career opportunities, with increasing demand for professionals who can work with databases and perform data analysis. Whether you're a digital marketer, software developer, business analyst, or data analyst, acquiring SQL skills can greatly enhance your skill set and unlock new career prospects.

What topics are covered in the free SQL course?

This free SQL course covers a wide range of topics to provide you with a comprehensive understanding of SQL and its applications. You will start with the basics, learning about the query language, relational databases, and foundational concepts of database systems. As you progress, you'll delve into advanced topics such as window functions, aggregate functions, and complex database operations. The course also focuses on practical knowledge, including efficient SQL queries, database design, and working with many-to-many relationships. With hands-on and practical learning options, you'll gain valuable skills in SQL and be equipped to handle analysis tasks and work with powerful tools.

What are the benefits of learning SQL?

Learning SQL and query language can greatly benefit your career goals, particularly in tech careers and data science roles. SQL is a standard language for working with relational databases, making it an essential skill in database application development, database administration, and data analysis. By acquiring SQL skills, you'll gain a critical skill set that is in high demand across industries. You'll be able to efficiently retrieve and manipulate data, perform advanced queries, and conduct analysis tasks. Whether you aspire to become a database architect, a business intelligence analyst, or a data scientist, SQL proficiency will significantly enhance your capabilities and open up exciting opportunities.

Is it really for free?

Absolutely! All the courses on this website are 100% free of charge. While you might need to pay for some of the tools featured in our free programming courses, most of them utilize free tools or offer free versions for you to explore.

How many classes are available?

We're continually adding new content, so you can expect a wide variety of courses! Stay tuned for regular updates.

I’m new to tech, will this be too hard for me?

No! Most of our courses are designed to be accessible even if you're new to tech. Our primary goal in offering these free courses is to help more people jumpstart their careers in tech. So, don't hesitate – dive in and give it a try!

How will I learn?

Our courses are organized into chapters, each featuring a lecture video created by one of our expert instructors. In these videos, they'll explain key concepts and demonstrate the process step by step. You'll also have access to the slides used in the videos. After watching the lecture, it's your turn to apply what you've learned! Tackle the challenges and create your own technical projects to solidify your understanding.

What is Le Wagon?

Le Wagon is a global leader in immersive tech training.
Our mission is to train people from all backgrounds in web development, data and no-code, give them the best learning experience of their life, and help them accelerate in their career.
We also help companies become more data-driven by leveraging their data and unlocking their employees’ potential through corporate training.
Founded in Paris in 2013, Le Wagon now has campuses in +40 cities across 25 countries, including global tech hubs such as Berlin, London, Tokyo, Shanghai, Singapore, and Sao Paulo. Most importantly, Le Wagon is a community of 20,000+ graduates - from all walks of life, including many entrepreneurs (who created 200+ tech startups and raised $862M+ globally), career changers, and digital nomads.