Simple question but I couldn't find any straight forward answers.
I have a customer details table with: customer ID, name, address, email.
I also have an delivery table with delivery ID, customer ID, order ID.
How can I link the customer ID column from the customer table to the delivery table so that when changes occur on the customer table they subsequently alter all other tables?
I know it might use foreign keys but I couldn't find any online resource that explained how to use them properly.
Cheers