Hi, Is there any way to enforce uniqueness of all non-nulls in a nullable column?
The "business requirement" would be "this kind of thing has an optional attribute, that, if it exists, is unique". For example, a company may or may not exist in the Byro van Dijk company database, but if it does exist it will have a unique BvD id. I'd like to enforce this uniqueness. Kjell -- -------------------------------------- Kjell Rilbe DataDIA AB E-post: [email protected] Telefon: 08-761 06 55 Mobil: 0733-44 24 64
