Re: Informal Survey #1 -- joins on foreign keys
Date: Wed, 11 Jan 2012 02:05:52 -0800 (PST)
Message-ID: <9faf91de-4d5b-4302-b1c8-f1152cab56ac_at_q8g2000yqa.googlegroups.com>
Typos.
On Jan 9, 10:29 pm, com..._at_hotmail.com wrote:
> A query is a relation expression is a
> predicate, is a relation value, is (for 0-tuples) a truth value, is a
> (true) proposition (via substituting body tuples into its predicate),
> is a request for a relation value, is a request for a truth value, is
> a request for a (true) proposition. How we use terms colloquial terms
> is irrelevant.
A query is a relation expression, is a
predicate, is a relation value, is (for 0-attribute values) a truth
value, is a
(true) proposition (via substituting present and absent tuples into
its predicate),
is a request for a relation value, is a request for a truth value, is
a request for a (true) proposition. But how we use colloquial terms
is irrelevant.
philip
Received on Wed Jan 11 2012 - 11:05:52 CET