On Thursday 18 March 2004 21:38, you wrote:
> Sad,
>
> > what are perfomance difference bitween
> > a) update t1 set f1 = 'x', f2 = 'y';
> > b) update t1 set f1 = 'x', f2 = f2;
> > c) update t1 set f1 = 'x';
> > ?
>
> Not a lot. Why don't you try it?
Really ! why ? :-)
I forgot to ask the second question:
How these updates affect a data storage ?
(does (b) cause physical update of f2 ?)