MariaDB is advertised as being one of the most popular open source relational databases valuing “performance, stability, and openness”. This is why it’s the default MySQL variant for Debian and as a result it’s often viewed as the relational database of choice for the Raspberry Pi .
The latest version of the Raspberry Pi OS runs Debian 10 (Buster) which offers MariaDB 10.3 with a simple install. However, this was released three years ago, meaning you are missing out on three years worth of new features and improvements. An example of some of those improvements include: