RE: [GENERAL] Relations between tables.
christian <crr@freemail.com.br>
From: christian <crr@freemail.com.br>
To: "Jackson, DeJuan" <djackson@cpsgroup.com>
Cc: pgsql-general@postgreSQL.org
Date: 1999-05-21T21:05:43Z
Lists: pgsql-general
On Thu, 20 May 1999, Jackson, DeJuan wrote: > Not in and of itself. The FOREIGN KEY CONSTRAINT syntax is parsed but not > implemented. Are there plans for this _important feature_ :) being implemented? > > MS Access has to be a poor example but I've seen tables relationed between > > themselves. > MS Access is a very poor example of most things SQL92. Okay, okay, forget access. I knew I was going to draw flames on this comparison. > Nope this doesn't even happen in <omitted>. If you build your query > in <omitted> and look at the SQL (go to the View menu the select SQL) > that's generated you'll see that all <omitted> is put that part of the > WHERE clause in for you. Most other databases aren't that > presumptuous. You're right. The constraint is simply a constraint - rows in this table must have a key listed in the column/table referred to in the Primary Key. Correct? cr