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Re: What is the difference of foreign key? - Mailing list pgsql-general

From serge.fonville
Subject Re: What is the difference of foreign key?
Date
Msg-id 680cbe0e0909240726m3fbd94cak1ee2436a52679288@mail.gmail.com
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In response to What is the difference of foreign key?  (纪晓曦 <sheepjxx@gmail.com>)
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Hi,
 
REFERENCES reftable [ ( refcolumn ) ] [ MATCH matchtype ] [ ON DELETE action ] [ ON UPDATE action ] (column constraint)
FOREIGN KEY ( column [, ... ] ) REFERENCES reftable [ ( refcolumn [, ... ] ) ] [ MATCH matchtype ] [ ON DELETE action ] [ ON UPDATE action ] (table constraint)

HTH
 
Regards,
 
Serge Fonville
 
On Thu, Sep 24, 2009 at 4:18 PM, 纪晓曦 <sheepjxx@gmail.com> wrote:
To be precise,
 
The difference between

create table a (
     foreign key (id) referenced by b(name),
);

create table b(
      id  integer referenced by b(name),
);



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