How to get uniqe number between two no. and delete that number

Question

hello i am trying to make a playing card game database .
i m store 1-52 number in one column like 1,2,3,4,5........  ,52
now i want to get rendom 7 number frim this column and delete that number after get
i dont get any idea how to do
plz give me idea or some help to make a better database any other option to store card number
thanks