Merlin Moncure schrieb am 18.10.2023 um 03:20:
> The only thing you can't really do in SQL easily without writing
> nasty triggers are things like, 'this table must be linked from one
> and only one of these candidate tables'. I think the language
> probably ought to support this, but I don't think postgres would
> unless the standard did.
Isn't that what assertions are intended to solve in the SQL standard?