Hi
This code should do your job:
alter table salesOrders
add OrderMatched varchar(3) null
update salesOrders
set OrderMatched = 'yes'
from salesOrders s join ProductList p on s.ProductID = p.ProductID
update salesOrders
set OrderMatched = 'no'
where OrderMatched is null
Igor Micev,My blog: www.igormicev.com