Re: Database design question
Date: 26 Jun 2006 08:28:41 -0700
Bob Badour wrote:
> sreedhardasi_at_gmail.com wrote:
> > I have a database design questions. How can we specify one of two
> > columns in a table should be not null? In other words, if one column is
> > null then another column should not be null.
> The simple answer is to avoid null in the first place. Null will affect
> the validity of everything it touches.
Thanks for your reply. How can we avoid nulls? If document has group level permissions, then what will be the value for the user id (Just blank)? Received on Mon Jun 26 2006 - 17:28:41 CEST