| From: | Adrian Klaver <adrian(dot)klaver(at)gmail(dot)com> |
|---|---|
| To: | JORGE MALDONADO <jorgemal1960(at)gmail(dot)com> |
| Cc: | "pgsql-sql(at)postgresql(dot)org" <pgsql-sql(at)postgresql(dot)org> |
| Subject: | Re: Unique index VS unique constraint |
| Date: | 2013-10-04 19:43:07 |
| Message-ID: | 524F1A4B.20606@gmail.com |
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| Lists: | pgsql-sql |
On 10/04/2013 09:48 AM, JORGE MALDONADO wrote:
> I have search for information about the difference between "unique
> index" and "unique constraint" in PostgreSQL without getting to a
> specific answer, so I kindly ask for an explanation that helps me
> clarify such concept.
The way I think of it is, that since the SQL standard does not mention
indices an INDEX (UNIQUE or otherwise) is just the databases application
of a constraint. So for practical purposes they are the same thing.
>
> Respectfully,
> Jorge Maldonado
--
Adrian Klaver
adrian(dot)klaver(at)gmail(dot)com
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