Finding records in one table that don't match records in another table.
I know this must be so easy. I have two tables. One has subscribers to the first three issues of my magazine, the other has subscribers to the next three issues of my magazine. I want to determine who didn't resubscribe. My plan is to identify the email addresses in the first table that are not found in the second table. How can I do this? Its the most basic question in the world but you are really helping me.