Re: Re: Design points (was: parent_ctor())

Stanislav Malyshev wrote: > AFAIK, meaning of foreign key is the opposite. I.e., this is not a link > between tables, it is a constraint on two table's contents. Links are done > with joins, you don't need any tricks for it. Are we talking about > different SQLs? No, you are correct, my examples were inexact. It is an advantage of SQL that the relationships between types are not as fixed as relationships between C types. Also, relationships between SQL types can be enforced better than relationships between C types, and this is where foreign keys and REFERENCES statements come into play. Kristian -- Kristian Köhntopp, NetUSE AG Siemenswall, D-24107 Kiel Tel: +49 431 386 436 00, Fax: +49 431 386 435 99 Using PHP3? See our web development library at http://phplib.netuse.de/