Step-by-step guide to learn SQL for free

If you're planning to join the tech world as a data analyst or data scientist, keep reading this blog for a step-by-step guide on how to learn SQL. Structured Query Language, commonly known as SQL, is the backbone of database management. It's a unique programming language used since the 1970s for creating, managing, and manipulating relational databases. Unlike languages that build apps and websites, SQL specializes in data storage, retrieval, and manipulation. This makes it essential for today's data-driven technology field. This guide will not only introduce you to SQL's fundamental role in managing data in relational database systems, but it will also provide a roadmap to mastering SQL skills using free online resources.

This guide is your gateway to understanding and utilizing SQL, opening doors to numerous opportunities in the tech industry. Let's start this learning journey together!

Why learn SQL?#

In our data-centric world, the ability to effectively navigate and manipulate data is becoming a universal asset across various professions. SQL enables you to efficiently retrieve the exact data you require, leveraging the database engine’s capabilities. Gaining proficiency in SQL equips you with the ability to swiftly adapt to almost any relational database system currently in use. This skill transcends specific software or employer, broadening your professional versatility.

SQL may be an old language, dating back nearly half a century, but its age is a testament to its enduring relevance. It’s not about becoming a SQL wizard, but grasping the basics, which can transform the way you approach data-related queries and decisions. This programming language stands at the heart of modern business operations. Companies—ranging from small startups to giants like Facebook, Netflix, and Uber—rely on databases powered by SQL to manage their vast data pools.

The utility of SQL spans various tech roles, including entry-level positions. SQL’s persistent relevance ensures it will continue to be a key technology for years to come.

How to learn SQL#

To master SQL, begin by defining your learning objectives, then dive into the basic syntax. Progress by engaging in guided projects, exploring various SQL resources. Eventually, create your own SQL projects to solidify your skills. As you gain confidence, tackle more advanced projects to deepen your understanding.

The prerequisites to learn SQL are not extensive. You should know the basics of computer science and the fundamentals of relational database management systems (RDBMS). Let’s discuss how you can use various resources to start gaining this knowledge.

Try SQL tutorials#

To get a quick grasp of SQL, online SQL tutorials are a great starting point. These tutorials, available in both text and video formats, cover the essentials. By engaging with these, you’ll understand the fundamental SQL commands.

Experiencing SQL’s visual interface can alleviate any initial anxiety and spark your curiosity. Start learning the basic commands and, as you progress through the sections, you can create your own tables and practice operations like select, insert, update, delete, and drop. Familiarize yourself with common SQL commands—such as CREATE, SELECT, INSERT, UPDATE, DELETE, DROP, and TRUNCATE—and gain a conceptual understanding of data manipulation and control languages. However, these tutorials do not give you feedback or any certification. Our interactive SQL course, ‘Learn SQL from Scratch,’ offers you both of these, making it ideal for beginners. 

Sign up for SQL online courses#

If you prefer structured learning, online courses are an ideal way to begin your SQL journey. Compared to videos, the text-based lessons in online courses allow you to absorb information twice. Online courses also offer the flexibility to learn at your own pace and track your progress. This often culminates in a certificate that can enhance your CV. Our SQL beginner course, ‘Learn SQL from Scratch,’ stands out by allowing real-time experimentation with SQL. It eliminates the need for the time-consuming installation of tools like Microsoft SQL Server and SQL Server Management Studio. Simply sign up and start experimenting with SQL coding. Make database query writing and modification more accessible for yourself. This course also provides feedback, helping you to confidently apply your knowledge to practical tasks involving tables, primary keys, data types, and more.

Great news for those looking to dive into SQL without impacting your budget: the ‘Learn SQL from Scratch’ course is entirely free. In just 10 hours, it provides a comprehensive understanding of key concepts. Let’s explore the advantages this no-cost course offers you:

• Gain foundational knowledge in SQL’s declarative nature.

• Learn to craft SQL queries effectively.

• Acquire hands-on experience in building SQL queries to extract vital information.

• Develop skills in creating, updating, and deleting data within databases.

• Start with basic SQL keywords like SELECT, FROM, and WHERE.

• Progress to advanced concepts including DISTINCT, ORDER BY, GROUP BY, and aggregate functions.

• Understand the significance of each keyword in enhancing SQL proficiency.

• Experience practical learning through hands-on projects, focusing on real-world applications.

• Learn to create and manage tables, understanding the structure and maintenance of databases.

• Complete projects that solidify your understanding and application of SQL concepts. This is one of the best ways to learn SQL.

Get hands-on: Practice SQL#

Despite SQL’s intuitive nature, excelling in SQL can be challenging. It’s not just about knowing the syntax—it involves much more. Wondering how to become great at SQL? The answer lies in deliberate practice. There are several platforms with SQL exercises that can help  you to enhance your skills and prepare for your next big career leap. Our SQL course is supported by 13 quizzes to gauge your learning progress. It will give you the practice you need to understand all the necessary concepts.

Start working on SQL projects#

Working on SQL projects not only helps you practice and enhance your current SQL skills but also allows you to develop new ones. Additionally, these projects can be a valuable part of your data portfolio, showcasing your skills to potential employers. Some examples of SQL projects are bank database management, hospital management systems, and library management systems. Try the ‘Connecting a Flask Application to AWS RDS (MySQL)’ project if you’re interested.

Start building your SQL skills now#

This blog gave you a straightforward roadmap to master SQL. Start building your SQL skills if you want to learn database management. Learn the basics, engage in hands-on projects, and use interactive online courses. Your focus should be on practical application and developing a solid skill set in SQL through real-world exercises and projects. Our free SQL course is perfect for this first step. Enroll now and build your SQL skills.

Happy learning!