Re: Database design, Keys and some other things
From: Gene Wirchenko <genew_at_ucantrade.com.NOTHERE>
Date: Mon, 26 Sep 2005 11:15:35 -0700
Message-ID: <ucegj1lti6ng1ajpuhp986os8u7dhklb1a_at_4ax.com>
Date: Mon, 26 Sep 2005 11:15:35 -0700
Message-ID: <ucegj1lti6ng1ajpuhp986os8u7dhklb1a_at_4ax.com>
On 25 Sep 2005 18:48:00 -0700, "vldm10" <vldm10_at_yahoo.com> wrote:
[snip]
>The second think, that we use often is the date or the time in the
>construction of an entity and a relationship. Can a date be an
>attribute of an entity? Can for example a date be an attribute of some
>person? I don't believe. Not to mention that time or date for some
Yes. The most common example is probably birthdate.
[snip]
Sincerely,
Gene Wirchenko Received on Mon Sep 26 2005 - 20:15:35 CEST