Re: COL unique (CustomerID) plus COL unique (COUNT) inside CustomerID

Hi,
you can use the UNIQUE constraint with two columns: UNIQUE(CustID, Count).

regards,
Szymon Lipiński

On 1 September 2016 at 11:28, Michelle Konzack <linux4michelle(at)gmail(dot)com>
wrote:

> Hello to all,
>
> after a period of silence from Debian, Courier, PHP and PostgreSQL I am
> half back and running into a problem... :-/
>
> I need a table with an UNIQUE CustomerID which is working fine...
>
> ...BUT I need also a second column with a count, which must be UNIQUE
> inside the CustomerID.
>
> In clear this:
>
> CustID Count
> 1 1
> 1 2
> 1 3
>
> 2 1
> 2 2
>
> 3 1
> 3 2
> 3 3
> ...
>
> How to do this?
>
> Thanks in avance
>
> --
> Michelle Konzack ITSystems
> GNU/Linux Developer 0033-6-61925193
>
>
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