Re: How to normalize this?
From: <compdb_at_hotmail.com>
Date: Sun, 5 May 2013 00:18:22 -0700 (PDT)
Message-ID: <de4ba4fa-8fb4-4480-8a86-ca09d3b5491d_at_googlegroups.com>
Date: Sun, 5 May 2013 00:18:22 -0700 (PDT)
Message-ID: <de4ba4fa-8fb4-4480-8a86-ca09d3b5491d_at_googlegroups.com>
On Saturday, May 4, 2013 4:28:01 PM UTC-7, com..._at_hotmail.com wrote:
> Eg if your only predicate/variable on attributes A1,..,An is p(A1,...,An) then the only predicates you can express on a subset of Ai,... involve "exists Ai,... p(A1,...,An)".
Oops, that's "exists ...all but Ai,... p(A1,...,An)".
philip Received on Sun May 05 2013 - 09:18:22 CEST