Hugo Kornelis wrote:
> On Fri, 9 Dec 2005 23:34:03 +0100, Jon Heggland wrote:
> Hi Jon,
>
> And yet, that is all there is to it. A NULL in a database is exactly
> like an empty cell in a spreadsheet - there's room where you'd expect a
> value, but when you look there is no value.
Hi Hugo, I wonder if that is a completely accurate comparison? For
example if I say that spreadsheet cell A1 is empty and A2 = A1 + 7,
then A2 resolves to 7. This seems much more analagous to a A1
representing an empty string (like this pick that i keep hearing about
on here). In a database a Null + anything would still be a Null - there
seems a difference between non-existent and empty, RDBMS using the
former, spreadsheets and pickies using the latter?
Received on Sun Dec 11 2005 - 18:16:14 CST
