Oh, OK. I thought they were in the same table.

On Thu, Nov 26, 2015 at 11:56 AM, Simon Slavin <slavins at bigfraud.org> wrote:
>
> On 26 Nov 2015, at 1:52pm, Bernardo Sulzbach <mafagafogigante at gmail.com> 
> wrote:
>
>> I did not mean that. But if you want to check that a certain row has a
>> valid value like you described,
>>
>>    check ((job='dealer' or job='agent') or can_discount='no')
>
> That works only when the "job" column is in the table the constraint is in.  
> In my case, there are two tables: client and sale.  The "job" column is in 
> the client table, but it's the sale table where I need to know if the client 
> deserves a discount.
>
> Simon.
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-- 
Bernardo Sulzbach

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