Am I the only one who's nervous about these two tables referencing each other like this? I would have a concern that this is being imposed, perhaps, by some external format that the data arrives in, and that a decently normalized design will have a simple all-key table containing nothing but serial # id's from both primary tables. Join 18 million Eudora users by signing up for a free Eudora Web-Mail account at http://www.eudoramail.com
