Subject Re: [Firebird-Architect] Nulls in CHECK Constraints
Author Dmitry Yemanov
"Claudio Valderrama C." <cvalde@...> wrote:
> Can you explain how a check on delete is necessary? I don't get the idea.
> Maybe if it references another table, but a thing like check (a > 0) has
> little sense when deleting.

The point was about multi-table checks.