Ð ÐÑÐ, 21.07.2004, Ð 09:44, sad ÐÐÑÐÑ:
> 4) Replication: to identify an object of ANY type (record of any table > regardless to datamodel), to store lists of deleted or modified objects > (regardless to datamodel) That sounds like a datamodel on data that belongs to another data model, and 5) applies. > 5) Making a primary key: if there is no real key at all. When there's no key at all, there can't be a surrogate key, as I understand it. In such cases a generated unique number comes in handy, and it's a real primary key and no surrogate key. ÐÐÐÑÐÐÐ -- Markus Bertheau <[EMAIL PROTECTED]> ---------------------------(end of broadcast)--------------------------- TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED]
