Relational Database freeCodeCamp Course
In September 2021, freeCodeCamp launched a beta version of its relational database course. This beta runs entirely within Visual Studio Code using the Docker and CodeRoad extensions.

In this course, you'll learn about Git, GitHub, Bash, Nano, SQL, PostgreSQL, and more. This is a fully project-based learning course sql database free

Some of the projects you'll build during the course include a Mario database, a world database, a celestial database, and a bike rental shop.

To learn more, you can read this article by Tom Mondloch who created the course.

SQL Tutorial - Complete Database Course for Beginners
In this free CodeCamp YouTube course, Mike Dane will teach you the basics of SQL. You'll learn how to create tables, insert data, wildcards, unions, joins, and more.

In this course, you will learn how to install MySQL on a Mac or Windows computer. You'll also practice your SQL skills by building corporate databases and ER diagrams.

If you enjoyed this course from Mike Dane, check out their YouTube channel for more free courses.

Learn SQL in 60 minutes
In this Web Dev Simplified YouTube course, Kyle will teach you the basics of SQL to get started. You'll learn about creating tables, inserting data into tables, primary keys, foreign keys, aggregate functions, and more.

This is a great course for a quick introduction to learning the basics. From here, you can continue building your first few projects using SQL.

SQL Beginners Tutorial
In this Amigoscode YouTube course, Nelson will teach you how to set up with PostgreSQL on Mac and Windows. Then, you'll learn the basics of SQL, including creating tables, primary keys, foreign keys, aggregate functions, and more.

If you liked this free YouTube course from Nelson, then you can check out his other courses on his channel or his paid courses on his website.

MySQL Database - Complete Course
In this free CodeCamp YouTube course, Bharath will teach you how to install MySQL on your local machine. Then, you'll learn how to create tables, insert data into tables, model data, lock, use SQL Explain, and more.

Bharath also provides useful resources to accompany the course, including a getting started guide and a GitHub repository for MySQL scripts.

If you like this course, then you can access other courses on their YouTube channel.

MySQL Beginners Tutorial - Complete Course
In this YouTube course on programming with Mosh, Mosh will teach you how to install MySQL on Mac or Windows. Then, you'll learn about creating tables, inserting data into a database, joins, operators, SQL clauses, SQL operators, and more.

If you liked this course from Mosh, then you can visit their YouTube channel or his website for paid courses.

MySQL Crash Course | Learn SQL
In this Traversy Media YouTube course, Brad will teach you the basics of getting started with MySQL. You will learn how to create tables, insert data into tables, alter tables, primary keys, foreign keys, aggregate functions, and more.

This is a great course for a quick introduction to learning the basics. From here, you can continue building your first few projects with MySQL.