Creating Relationships in SQL
I took the Macrosoft Technology Associate Course: 40364 Database Administration Fundamentals, which covers core SQL Server concepts, manipulating data, creating queries and database administration. As a result, the course participants are equipped with the fundamental and practical knowledge to get them started on building their own relational databases.
Some of the exercies done in SQL are demonstrated on GitHub repo Querying_with_Transact-SQL.
Additionally, SQL complete tutorial, from beginner to advanced concepts, covering MySQL database fundamentals and advanced topics, created by Mosh Hamedani, was covered. Also, interactively, exercises from MODE website are covered as well. All solutions are demonstrated here: SQL complete tutorial.