| Subject | Re: [firebird-support] unique constraint on a pair, one NOT NULL, one NULL |
|---|---|
| Author | Dimitry Sibiryakov |
| Post date | 2009-05-05T19:54:59Z |
> It is possible or must it be done in triggers?Unique constraints cannot be done by triggers.
And, BTW, this is not Interbase support list.
SY, SD.