When working with MariaDB CLI, a common challenge many users face is clearing the console. Unlike other command-line interfaces, using the "clear" command alone won't produce the desired result. Instead, you need to add the "\!" symbol before the command to execute the system shell command. Alternatively, pressing CTRL + L will also clear the screen.

Source: https://dev.to/sertxudev/clear-screen-at-mariadb-cli-17ek