Re: Table-design for categories, suggestions needed
От | Victor Hugo |
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Тема | Re: Table-design for categories, suggestions needed |
Дата | |
Msg-id | AANLkTi=S-ViscVN180OCVS=Xq0iP86mkcYoW7mMjpR2J@mail.gmail.com обсуждение исходный текст |
Ответ на | Re: Table-design for categories, suggestions needed (gargoyle60 <gargoyle60@example.invalid>) |
Ответы |
Re: Table-design for categories, suggestions needed
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Список | pgsql-novice |
Hi, Think that an error of modeling. Occur this way, where there are 5 types of subcategory in the table, there could be another table containing the information category and subcategory. Got it? exemple: TABLE categories (id, name_category) TABLE subcategories (id, name_subcategory) TABLE components (id, name_component) TABLE category_subcategory (id_category references categories(id), id_subcategory references subcategories(id) ) I think it would be better to model your system. Bye, Victor Hugo 2010/8/7 gargoyle60 <gargoyle60@example.invalid>: > On Fri, 06 Aug 2010 19:54:01 -0400, Lew <noone@lewscanon.com> wrote: > >>On 08/05/2010 04:06 AM, gargoyle60 wrote: >>> Oops, that should read... >>> ... >>> FOREIGN KEY (parent_level) >>> REFERENCES category (category_level) >> >>So category (category_level) is a unique or primary key, then. > > Something like that, probably with (category_level, category_code). > Like I said, I never got around to implementing the provisional design and there may be more to it > than that. > > -- > Sent via pgsql-novice mailing list (pgsql-novice@postgresql.org) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-novice > -- []´s Victor Hugo
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