A easy way to handle this:
create table marble
(
id int4 primary key,
color1 int4,
color2 int4,
color3 int4
);
create table color
(
id int4,
desc text
);
color1, color2, and color3 point to the id in color table.
This way you can expand your color table indefinitely.
On 27 Jun 2001 23:44:34 -0500, Christian Anton wrote:
> Hello all,
>
> I am fairly new at db design, I have built a few simple in the past and have
> never dealt with this type of problem before, any help would be appreciated.
>
> I have three attributes in one table that should reference one, and only
> one, attribute in another table. Here's an analogy of the problem:
>
> I have a table with a list of marbles, each marble has three colors in it
> (color1, color2, color3) and a serial number. In another table I have eight
> colors to choose from but the list of colors grows regularly.
> How do I associate a marble with three colors from the color table (a marble
> may have three red sides or red-yellow-blue)?
>
> Thanks,
> Christian
>
>
>
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--
Wei Weng
Network Software Engineer
KenCast Inc.
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