mysql

MySQL is an open-source relational database management system that is used widely for developing web-based applications and managing large volumes of data. It is known for its speed, reliability, and ease of use. MySQL is compatible with various operating systems and programming languages, making it one of the most popular database systems in the world.

The SQL language is pretty easy to use and learn with little to no help. It is also a handy language to know if you know you will be working with large datasets stored in databases. There are all kinds of books out there to help you learn any programming languages there are books to learn php, dba books, javascript books, even a certification book for any language, and more.