Robert Stewart
rls at WeBeDb.com
Fri May 27 15:12:53 CDT 2011
And in the case of social service agencies that deal with illegal aliens, the SSN can also be duplicated. I have seen that numerous times working with them on my application. At 01:18 PM 5/27/2011, you wrote: >Date: Fri, 27 May 2011 09:52:16 -0700 >From: Charlotte Foust <charlotte.foust at gmail.com> >To: Access Developers discussion and problem solving > <accessd at databaseadvisors.com> >Subject: Re: [AccessD] [Spam]8.31 Re: 2 quick questions >Message-ID: <BANLkTik3fAoGcxkDv8Rp7zd_WzQ-rgZm1Q at mail.gmail.com> >Content-Type: text/plain; charset=ISO-8859-1 > >I've argued with experts about IKs like social security numbers. >Their arguments always seem to boil down to, "Well, they don't USUALLY >change, so that's OK." I prefer to violate strict normalization and >include an IK that CAN be changed and an autonumber that can't. Then >when the IK must be changed (i.e., wrong SSN), the connections among >tables aren't lost. Robert L. Stewart www.WeBeDb.com www.DBGUIDesign.com www.RLStewartPhotography.com