the two questions
From: vldm10 <vldm10_at_yahoo.com>
Date: Fri, 23 Nov 2007 16:38:46 -0800 (PST)
Message-ID: <9e985e28-5332-4955-b1d8-d151f708643f_at_s6g2000prc.googlegroups.com>
Not long time ago on this NG there were few posts which involved an entity with 200+ attributes.
Let all these attributes satisfy the following two conditions: 1) All these attributes are mutually independent 2) Every attribute of an entity can change its value - like in "Temporal DB"
Date: Fri, 23 Nov 2007 16:38:46 -0800 (PST)
Message-ID: <9e985e28-5332-4955-b1d8-d151f708643f_at_s6g2000prc.googlegroups.com>
Not long time ago on this NG there were few posts which involved an entity with 200+ attributes.
Let all these attributes satisfy the following two conditions: 1) All these attributes are mutually independent 2) Every attribute of an entity can change its value - like in "Temporal DB"
Now I have two questions:
- How many attributes has a key of the corresponding relation?
- How many attributes has a key of m-n relationship between the two mentioned entities?
Vladimir Odrljin Received on Sat Nov 24 2007 - 01:38:46 CET