- there's however just an
example for C. I don't want to engage the compiler :-/
> -Original Message-
> From: sad [mailto:[EMAIL PROTECTED]
> Sent: Mittwoch, 12. Jänner 2005 07:40
> To: KÖPFERL Robert
> Cc: pgsql-sql@postgresql.org
> Subject: Re: [SQL] Single row
On Tuesday 11 January 2005 17:45, KÖPFERL Robert wrote:
> Hi,
>
> with what constraint or how can I ensure that one of my tables has exact
> one record or 0..1 records?
A trigger procedure BEFORE INSERT would help you.
And a column type with only one possible field value would help you if you
de
Sent: Dienstag, 11. Jänner 2005 15:50
> To: KÖPFERL Robert
> Cc: pgsql-sql@postgresql.org
> Subject: RE: [SQL] Single row tables
>
>
> I suppose you could put a check constraint that forces a
> single value on a column with a unique index? Or an insert
> trigger that alway
I suppose you could put a check constraint that forces a single value on a
column with a unique index? Or an insert trigger that always inserts the same
value into a unique field.
Out of curiosity, why do you need to do this?
Dmitri
-Original Message-
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