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Pseudo transitivity

From: Phil Cook <pacook_at_blueyonder.co.uk>
Date: Tue, 27 Mar 2001 21:47:21 GMT
Message-ID: <JT7w6.1136$J01.408573_at_news2.cableinet.net> 






I am told that if X ---> Y and YW ---> Z, then XW ---> Z




Given schema(R) = {C,T,H,R,S,G}, I have the following FDs:



 HS ---> R


HR ---> C



Can I therefore say that HHS ---> C and from that HS ---> C?
Received on Tue Mar 27 2001 - 23:47:21 CEST












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