Oracle FAQ Your Portal to the Oracle Knowledge Grid
HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US
 

Home -> Community -> Mailing Lists -> Oracle-L -> Re: datamodelling question: updating foreign keys

Re: datamodelling question: updating foreign keys

From: AK <oramagic_at_hotmail.com>
Date: Thu, 06 Nov 2003 09:19:26 -0800
Message-ID: <F001.005D5D87.20031106091926@fatcity.com>


Well ,

How about cargo as table with primary key say cargo_id which unqiely identifies cargo and weight . Now you should have a cargo detail table that will have cargo_id , load , truck_id .

So

Cargo



cargo_id
total_load
date
blah
blah

cargo_detail



cargo_id
truck_id
load
date_delivered
blah
blah
from
to

This takes care of split cargo ( consigment ) .

-Ak

> I remember seeing this question asked on another forum some time back. I
dont like the solution the guy had and Im wondering how some of you might solve problem. Im giving a low level generic example.
>
> Lets say you have a parent-child relationship. The parent table is
'TRUCKS' and the child table is 'CARGO'. The foreign key to CARGO tells which truck the cargo is loaded on. When the cargo is moved to another truck, the foreign key is updated.
>
> I dont like this approach. it causes contention. what is a better way to
design this?
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.net
> --
> Author: <ryan_oracle_at_cox.net
> INET: ryan_oracle_at_cox.net
>
> Fat City Network Services -- 858-538-5051 http://www.fatcity.com
> San Diego, California -- Mailing list and web hosting services
> ---------------------------------------------------------------------
> To REMOVE yourself from this mailing list, send an E-Mail message
> to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
> the message BODY, include a line containing: UNSUB ORACLE-L
> (or the name of mailing list you want to be removed from). You may
> also send the HELP command for other information (like subscribing).
>

-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: AK
  INET: oramagic_at_hotmail.com

Fat City Network Services    -- 858-538-5051 http://www.fatcity.com
San Diego, California        -- Mailing list and web hosting services
---------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).
Received on Thu Nov 06 2003 - 11:19:26 CST

Original text of this message

HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US