I know this one. It can be empty, which a singleton cannot be. For a
singleton table, you should have one and only one row, you cannot insert or
delete, so this is only part of the real thing.
Surely we can do a bit better than that, if that's what you really want.
Create the table with an initial row and add a trigger preventing anything
except update.
Yes.
I just meant that this is not available easily "out of the box", but it is
obviously doable with some effort... which people would seldom do.
--
Fabien.
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