RE: [GENERAL] Relations between tables.
От | christian |
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Тема | RE: [GENERAL] Relations between tables. |
Дата | |
Msg-id | Pine.LNX.4.10.9905211800120.1571-100000@violinux.apocalypse.now обсуждение исходный текст |
Ответ на | RE: [GENERAL] Relations between tables. ("Jackson, DeJuan" <djackson@cpsgroup.com>) |
Ответы |
Re: [GENERAL] Relations between tables.
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Список | 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
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