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 ----- Original Message ----- To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]> Sent: Thursday, November 06, 2003 6:44 AM > 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: <[EMAIL PROTECTED] > INET: [EMAIL PROTECTED] > > 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: [EMAIL PROTECTED] (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: [EMAIL PROTECTED] 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: [EMAIL PROTECTED] (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).
