MySql is a relational Database Management System.

MySql Server

MySql can start on boot time or only if you type manually:

/etc/init.d/mysql start

Run mysql_fix_privilege_tables.

MySql will only install if you have a NON-NUMERIC hostname that is resolvable via the /etc/host file

["MySQL"] server creates the user debian-sys-maint that is used in the start-stop and cron ["script"]s. Don't delete him.