Re: Database design question
Date: Mon, 26 Jun 2006 15:18:33 GMT
> 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. Received on Mon Jun 26 2006 - 17:18:33 CEST