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Re: Navigation vs Relational operators

From: Alfredo Novoa <alfredo_at_ncs.es>
Date: 16 May 2004 06:19:01 -0700
Message-ID: <e4330f45.0405160519.2fe170f@posting.google.com> 





paul_geoffrey_brown_at_yahoo.com (Paul G. Brown) wrote in message news:<57da7b56.0405141600.89f461e_at_posting.google.com>...
 


> > What anti-join is? 

> 

>   Given two relations, R < a, b, c > and Q < a, d, e >, the anti-join 

>   R [Aj] Q is all tuples from R where there does not exist a corresponding 

>   tuple in Q meeting some join criteria. 




Thanks
Received on Sun May 16 2004 - 08:19:01 CDT












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