Christoph Lechner <[EMAIL PROTECTED]> wrote: > OK. I took a look at the database. So a question came to mind when I saw > the layout of the 'device' table: > Why do you store the relationship between entries in the 'device' table > and entries in the 'supplier' table in fields named supplier*, > ordering_code*, price* in the 'device' table? What if there are more > than 3 suppliers for any given part? > > As the relation between 'device' and 'supplier' is a many-many > relationship, you'd be better off creating just another table, holding > the device's ID, the ID of the supplier and fields for the ordering_code > and the price. Then you only need to LEFT JOIN the tables > rel-device-supplier and supplier and you get all suppliers for a given > part. This would give you a somewhat tidier DB layout ...
Ok, I have modified the structure of my database. Thank's for the hint. -- Levente http://web.interware.hu/lekovacs _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
