XAMPP uses the MariaDB database officially. While there are many other options in databases, users of XAMPP are preferring to use like MySQL, etc.
Do check out Intellipaat’s Web development courses which is a MEAN Stack training of 192hrs and sufficient time of 248hrs for exercises and projects to help you get the required hands-on experience.
Also, do check out our YouTube video from our experts on XAMPP Step by Step Setup to gain more insight.