| From: | Darren Ferguson <darren(at)crystalballinc(dot)com> |
|---|---|
| To: | Erwin Ambrosch <ambre(at)ebutec(dot)com> |
| Cc: | pgsql-general(at)postgresql(dot)org |
| Subject: | Re: PRIMARY KEY and UNIQUE |
| Date: | 2002-02-14 15:29:09 |
| Message-ID: | Pine.LNX.4.10.10202141028210.3159-100000@thread.crystalballinc.com |
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| Thread: | |
| Lists: | pgsql-general |
If it is a primary key then it will automatically be UNIQUE.
You do not need the unique next to the VARCHAR in this situation
Darren
On Thu, 14 Feb 2002, Erwin Ambrosch wrote:
> Hi,
>
> I have a such a table.
>
> CREATE TABLE int_article (
> name VARCHAR(12) UNIQUE
> headline TEXT,
> summary TEXT,
> main TEXT,
> footer TEXT,
> PRIMARY KEY (name)
> );
>
> Is the UNIQUE constraint neccessary, because if have specified the column
> name to be the primary key.
>
> Thanks in advance
> Erwin
>
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