On 30 May 2006 at 6:21, chee hee wrote:

> What is the different between these two statements and which one is
> preferred:

In first case constraint will get system-generated name. That's
all.
I'd recommend second form with explicit name because in this case
you don't need to find out constraint name if you ever want to drop
it.

--
SY, Dimitry Sibiryakov.