| From: | Bill Harper <bharper(at)solutionst(dot)com> |
|---|---|
| To: | Jodi Kanter <jkanter(at)virginia(dot)edu> |
| Cc: | Postgres Admin List <pgsql-admin(at)postgresql(dot)org> |
| Subject: | Re: no dup rows |
| Date: | 2004-08-02 19:05:42 |
| Message-ID: | 410E9086.3060204@solutionst.com |
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| Thread: | |
| Lists: | pgsql-admin |
Jodi Kanter wrote:
> I have a linking table that has only two fields in it and both are
> foreign keys to other tables. I'd like to ensure that there are never
> any duplicate rows in this table. I was planning on creating a
> multi-column unique index to satisfy this requirement. Is there a more
> appropriate way to accomplish this or am I on the right track?>
> thanks.
> Jodi
> --
>
> /_______________________________
> //Jodi L Kanter
> BioInformatics Database Administrator
> University of Virginia
> (434) 924-2846
> jkanter(at)virginia(dot)edu <mailto:jkanter(at)virginia(dot)edu100>/
>
>
>
Just create a primary key on the two columns, that way you get
uniqueness and not null constraints.
-bill
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