terminal SQL command on website

sorry for asking useless question, but this is for my college's assigment i've been looking bout this problem but no one has though to i just thinking about adding terminal sql command column in my website maybe some people who open my web cannot use this terminal sql command therefor i make it for admin page only it can be me or other people that i appoint as admin so i can sharpen my knowledge and my friend bout sql code through my web page

well, is it possible to add terminal sql command on website ? and whether there are other references bout it ?