Ok so I have three tables Customers,Invoices,and Delivery with the fields:
Customers:
CustomerID
Address
........
Orders:
OrderID
DeliveryID
.......
Delivery:
DeliveryID
DeliveryToAddress
......
So what I want to do is update my delivery table for the DeliveryToAddress for when the customers address changes within the customers tables. To get the Customers address into the delivery table it needs to pass through the order table. How do I do this as everything that I have tried does not seem to work?