Does entity integrity imply entity identity?
From: Mr. Scott <do_not_reply_at_noone.com>
Date: Sat, 1 Aug 2009 10:48:35 -0400
Message-ID: <IaKdnaZV7ZxZyOnXnZ2dnUVZ_uednZ2d_at_giganews.com>
Since the entity integrity rule ensures that a relational table cannot have any duplicate rows, does that imply that each row in a table maps to a distinct entity? Received on Sat Aug 01 2009 - 16:48:35 CEST
Date: Sat, 1 Aug 2009 10:48:35 -0400
Message-ID: <IaKdnaZV7ZxZyOnXnZ2dnUVZ_uednZ2d_at_giganews.com>
Since the entity integrity rule ensures that a relational table cannot have any duplicate rows, does that imply that each row in a table maps to a distinct entity? Received on Sat Aug 01 2009 - 16:48:35 CEST