Re: Recursive Arrays 101
От | Rob Sargent |
---|---|
Тема | Re: Recursive Arrays 101 |
Дата | |
Msg-id | 562E42D0.1040602@gmail.com обсуждение исходный текст |
Ответ на | Re: Recursive Arrays 101 (Jim Nasby <Jim.Nasby@BlueTreble.com>) |
Ответы |
Re: Recursive Arrays 101
|
Список | pgsql-general |
On 10/26/2015 08:43 AM, Jim Nasby wrote:
On 10/25/15 8:10 PM, David Blomstrom wrote:Seems to me that if life boils down to four attributes one would have a single table with those four attributes on the particular life form. Now, the four attributes could be ids into definitional tables but I suspect the querying will be done string/name so why complicate the lookups: make the names a foreign key in the defs if necessary.@ Adrian Klaver: Oh, so you're suggesting I make separate tables for
kingdoms, classes and on down to species. I'll research foreign keys and
see what I can come up with. I hope I can make separate tables for
mammal species, bird species, fish species, etc. There are just so many
species - especially fish - the spreadsheets I use to organize them are
just about maxed out as it is.
The suggestion is simply to have 7 tables:
CREATE TABLE kingdom(
kingdom_id serial PRIMARY KEY
, kingdom_name text NOT NULL
, ...
);
CREATE TABLE phylum(
phylum_id serial PRIMARY KEY
, kingdom_id int NOT NULL REFERENCES kingdom
, ...
);
CREATE TABLE class(
...
);
and so-on.
Personally I think the recursive structure is the way to go.
В списке pgsql-general по дате отправления: