Subject:
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Re: Online LEGO Inventory Database
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Newsgroups:
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lugnet.db.brictionary
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Date:
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Thu, 10 Feb 2000 20:19:45 GMT
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Viewed:
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3129 times
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Steve Bliss wrote in message ...
> > > Yep. A better approach may be modeling a set of properties. So a plate • with
> > > holes in it could have both the Technic and Plate properties. This would • avoid
> > > requiring a hierarchical classification (is that redundant?) system.
> >
> > Yeah, I agree. One of the other threads had come to the same conclusion • and
> > are curently trying to decide exactly which properties would be necessary.
>
> Having a good list of properties at the start is a good idea, but don't
> hard-code specific properties into the schema. It's just a many-to-many
> relation between parts and properties. Assuming a relational approach.
Here is the current scema. I have decided to concentrate on the parts
section,
and themn move onto creating a set inventory section (which I think will be
the easy part)...
Total of 6 tables:
lego_part_item
lego_part_descriptions
lego_part_groups
lego_part_lookup_color
lego_part_lookup_group
lego_part_lookup_source
laid out as such:
*** lego_part_item
part_id integer (auto-increment)
color_id integer references lego_part_lookup_color(color_id)
*** lego_part_descriptions
part_description_id integer (auto-increment)
part_id integer references lego_part_item(part_id)
description varchar(128)
source_id int references
lego_part_lookup_source(source_id)
*** lego_part_groups
part_id integer references lego_part_item(part_id)
group_id integer references
lego_part_lookup_group(group_id)
*** lego_part_lookup_color
color_id integer (auto-increment)
description varchar(32)
*** lego_part_lookup_group
group_id integer (auto-increment)
description varchar(96)
*** lego_part_lookup_source
source_id integer (auto-increment)
description varchar(16)
I have an actual SQL script to create these tables, but I
thought this would be easier to look at.
Alright guys - hack it up.
--Eric
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Message is in Reply To:
 | | Re: Online LEGO Inventory Database
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| (...) Having a good list of properties at the start is a good idea, but don't hard-code specific properties into the schema. It's just a many-to-many relation between parts and properties. Assuming a relational approach. Steve (24 years ago, 10-Feb-00, to lugnet.db.brictionary)
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