How do i get my domain name after the subdomain? ?

i can only have the subdoamin after the doamin like this

do i have to make a mysql to do that?

Use the control panel and goto the location for creating a domain. This same section will create sub domains.
FYI, a subdomain is before the domain name, after the domain name is called a sub directory.

My website

oooo thank you so much that helps alot^^