Re: Multiplicity, Change and MV

From: Bob Badour <bbadour_at_pei.sympatico.ca>
Date: Thu, 13 Apr 2006 20:42:34 GMT
Message-ID: <_Iy%f.59462$VV4.1097654@ursa-nb00s0.nbnet.nb.ca>

Neo wrote:

> In RM, the proper method of allowing an attribute to have multiple
> values is to have a separate table.

You are an ignorant who doesn't know what he is talking about.

> If the separate table is not
> included in the initial schema, adding it later usually requires schema
> changes, data migration and script/query/code updates.

Your statement is a tautology. "Changing the schema requires schema changes." Well, duh.

> MV allows an attribute to have multiple values without schema changes.

Not if the attribute was originally constrained to single values. Changing from a single value to multiple values is a schema change. Duh! Received on Thu Apr 13 2006 - 15:42:34 CDT