how to completely delete everything from mysql unbunto code example

Example 1: uninstall mysql 8 ubuntu 20.04

sudo apt-get remove --purge mysql*

Example 2: uninstall mysql ubuntu 18.04

$ sudo apt-get remove --purge mysql-server mysql-client mysql-common -y
$ sudo apt-get autoremove -y
$ sudo apt-get autoclean
$ sudo rm -rf /etc/mysql
# Delete all MySQL files on your server: 
$ sudo find / -iname 'mysql*' -exec rm -rf {} \;