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Re: Relation Schemata vs. Relation Variables

From: paul c <toledobythesea_at_oohay.ac>
Date: Thu, 24 Aug 2006 23:01:04 GMT
Message-ID: <QcqHg.452359$Mn5.245886@pd7tw3no> 





paul c wrote:


...


> 

> PMFJI, I would say that the VALUE of a candidate key identifies one and 

> only one tuple FOREVER! 




Stupid me, I have to take part of that back - the value of a candidate 
key obviously could identify several tuples but I still think that would 
hold forever.  Might have been better to say the value of a candidate 
key identifies a tuple regardless of time.



p
Received on Thu Aug 24 2006 - 18:01:04 CDT












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