[Zope] constraint in postgres

[Fred Yankowski]

Isn't this a classic "referential integrity" case?  If so, you could
try this:

	create table country (id serial primary key, ...);

	create table address (id serial,
			      country_id int4 references country, ...);


On Wed, Feb 14, 2001 at 09:29:27AM +0100, Olaf Zanger wrote:
> i want to make some constraint-restrictions with two tables in postgres 
> 
> create table address ( id serial,  country_id int4, ....);
> and
> create table country (id serial, ...);
> 
> i want to make sure that the country-row with "id=2" is not deleted 
> if there is still a corresponding data-set with "country_id=2" in the address table.

-- 
Fred Yankowski           fred@OntoSys.com      tel: +1.630.879.1312
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