forUpdate flag

[Florian Bogeschdorfer]

> >
> Yes, but why do I want to have NULL fields? Why not just "" or 0 etc.? My
> problem not getting this maybe have to do with me coming from VB were as
> an

Because NULL is different to "" and 0, "" and 0 are still values. For
example if you want to erase a unique field - "" and 0 are impossible
because you could not erase more than one field. But if you set it to NULL
it has no value and you can set several fields to NULL.

Florian