MESSAGE
DATE | 2014-12-18 |
FROM | Ruben Safir
|
SUBJECT | Re: [LIU Comp Sci] Normalization review
|
From owner-learn-outgoing-at-mrbrklyn.com Thu Dec 18 11:56:13 2014 Return-Path: X-Original-To: archive-at-mrbrklyn.com Delivered-To: archive-at-mrbrklyn.com Received: by mrbrklyn.com (Postfix) id 452DE161167; Thu, 18 Dec 2014 11:56:13 -0500 (EST) Delivered-To: learn-outgoing-at-mrbrklyn.com Received: by mrbrklyn.com (Postfix, from userid 28) id 2FAE5161169; Thu, 18 Dec 2014 11:56:13 -0500 (EST) Delivered-To: learn-at-mrbrklyn.com Received: from mailbackend.panix.com (mailbackend.panix.com [166.84.1.89]) by mrbrklyn.com (Postfix) with ESMTP id 4DDAE161167 for ; Thu, 18 Dec 2014 11:56:11 -0500 (EST) Received: from panix2.panix.com (panix2.panix.com [166.84.1.2]) by mailbackend.panix.com (Postfix) with ESMTP id 29FCA13BFC for ; Thu, 18 Dec 2014 11:56:10 -0500 (EST) Received: by panix2.panix.com (Postfix, from userid 20529) id 121A333C87; Thu, 18 Dec 2014 11:56:10 -0500 (EST) Date: Thu, 18 Dec 2014 11:56:10 -0500 From: Ruben Safir To: learn-at-mrbrklyn.com Subject: Re: [LIU Comp Sci] Normalization review Message-ID: <20141218165609.GA3184-at-panix.com> References: <20141218153424.GA4242-at-panix.com> <20141218154519.GC4242-at-panix.com> <20141218160916.GA14854-at-panix.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20141218160916.GA14854-at-panix.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: owner-learn-at-mrbrklyn.com Precedence: bulk Reply-To: learn-at-mrbrklyn.com
what exactly is the difference between the 2nd and 3rd NF
Ruben
On Thu, Dec 18, 2014 at 11:09:16AM -0500, Ruben Safir wrote: > is a foriegn key a dependedncy for a relation with a seperae primary > key? > > > > Like Course has a cno primary and a deptno foreign key. > > > On Thu, Dec 18, 2014 at 10:50:31AM -0500, Sergei Glikstein wrote: > > where is that? > > > > On Thu, Dec 18, 2014 at 10:45 AM, Ruben Safir wrote: > > > > > > On Thu, Dec 18, 2014 at 10:39:29AM -0500, Sergei Glikstein wrote: > > > > i am in the library upstairs > > > > > > > > On Thu, Dec 18, 2014 at 10:34 AM, Ruben Safir > > > wrote: > > > > > > > > > > Anyone want to review normalization? > > > > > > > > > > Ruben > > > > > > > > > > > > > > > > > > > why not come here so I can pick your brain without distractions and with > > > a network that functions. > > > > > > Everytime i go to that damn libvrary i waste my time > > > > > > Ruben > > > > > > BTW - you know IRC - xchat? > > > > > > Ruben > > > > > >
|
|