SQL Server computed column select from another table

Question

I\'m not to sure what the best way to go about this is, so i\'ll describe what the end goal is, and if a computed column is the answer then please help me go that route, or

Answer 1

if it is only for display purposes,why not create a view..

select <> mediaspend+basicadviews as totaladviews
from 
orders o
join
packages p
on p.packageid=o.orderid