Posted by info on 05/29/07 09:25

Hi,

I need this behaviour: 1 + null = 1
I have a (dynamic) set of many columns containing decimals that I want
to add as follows:
if all columns are null the result should be null
if not all columns are null, the null columns may be regarded as 0.

E.g.
null + null + 1 = 1
null + null + null = null

The problem is that the first expression yields null.

Up till now I generated an update statement with isnull(<column>,0),
however, then the second expression yields 0.
I can add another update statment setting the result to null if all
columns are null, but this is very slow, and not very intuitive
either.
How nice it would be if there were a setting like 'concat null yields
null' for arithmetic operators.

Anyone any idea how to fix this?

Thanks.
Paul

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