FIND_IN_SET() vs IN()

Question

I have 2 tables in my database. One is for orders, and one is for companies.

Orders has this structure:

OrderID     |     attachedCompanyIDs
-------         


        

Answer 1

To get the all related companies name, not based on particular Id.

SELECT 
    (SELECT GROUP_CONCAT(cmp.cmpny_name) 
    FROM company cmp 
    WHERE FIND_IN_SET(cmp.CompanyID, odr.attachedCompanyIDs)
    ) AS COMPANIES
FROM orders odr