From: Davi Leal <davi@leals.com>
To: pgsql-sql@postgresql.org
Subject: Foreign Key: what value?
Date: Wed, 5 Jul 2006 17:19:26 +0200
Message-ID: <200607051719.27466.davi@leals.com> (raw)
Hi,
How to know the value which I must set in the foreign key field?. I have two
tables:
CREATE TABLE AAAAAA (
Id SERIAL PRIMARY KEY,
data char(9)
);
CREATE TABLE BBBBBB (
BBBBBB_Id integer REFERENCES AAAAAA(Id) NOT NULL,
field char(5)
);
I insert a register on table AAAAAA,
INSERT INTO AAAAAA (data) VALUES ('123456789');
and then, I want to insert a related register in table BBBBBB, but I do not
know how get the proper value to the Foreign key BBBBBB_Id. Note that a lot of
client are inserting at the same time on the AAAAAA table, so I can not just
get the greater value of AAAAAA.Id
Maybe using transactions ?. Any tip, URI, ... will be welcome.
INSERT INTO BBBBBB (BBBBBB_Id, field) VALUES (??????,'12345');
Regards,
Davi
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To: pgsql-sql@postgresql.org
Cc: davi@leals.com
Subject: Re: Foreign Key: what value?
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