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

SELECT o.*, GROUP_CONCAT(c.name) FROM Orders AS o , Company.c
    WHERE FIND_IN_SET(c.CompanyID , o.attachedCompanyIDs) GROUP BY o.attachedCompanyIDs