Re: Oids

vc wrote:
> According to your own definition, the generalized union is (in terms
> of the standard RA):
>
> 'gu' = union(project( a&b, A), project( a&b, B),
>
> where A and B are relations, a and b are their respective sets of
> attributes, & is the set intersection Applying this definition to
>
> '00' 'gu' A, we obtain either 00 or 01.

What is

project({}, A)

? Received on Wed Aug 17 2005 - 16:19:51 CDT