Re: CHECK col A not NULL if col B='x' - Mailing list pgsql-sql

Hola Martin!

Martin Marques wrote:

> El Mar 28 Sep 2004 11:02, T E Schmitz escribió:
> 
>>Is it possible to set up a table CHECK, which ensures that column A is
>>NOT NULL if column B = 'x' ?
> 
> CONSTRAINT somename CHECK (B <> 'x' OR A IS NOT NULL)

This is brilliant. Only detected this today. Don't know how I managed to 
overlook the CHECK constraints ;-)

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Regards/Gruß,

Tarlika Elisabeth Schmitz