Re: Functional Dependencies?
From: -CELKO- <jcelko212_at_earthlink.net>
Date: 1 Oct 2005 08:30:13 -0700
Message-ID: <1128180613.486016.257480_at_g47g2000cwa.googlegroups.com>
Date: 1 Oct 2005 08:30:13 -0700
Message-ID: <1128180613.486016.257480_at_g47g2000cwa.googlegroups.com>
A functional dependency A -> B says "A determines B", so if you know a value for an A, then you can determine the value of a a B. A multi-valued Dependency, A ->> B says "A determines a set of Bs".
Google Armstrong's Axioms for the ruels that govern these operations. Received on Sat Oct 01 2005 - 17:30:13 CEST