Re: MERGE as the imperative form of aggregation
From: Marshall <marshall.spight_at_gmail.com>
Date: 16 Apr 2007 07:36:19 -0700
Message-ID: <1176734179.142622.193360_at_p77g2000hsh.googlegroups.com>
Date: 16 Apr 2007 07:36:19 -0700
Message-ID: <1176734179.142622.193360_at_p77g2000hsh.googlegroups.com>
On Apr 16, 6:57 am, paul c <toledobythe..._at_oohay.ac> wrote:
>
> By the way, I don't think assignment is necessary, therefore it's not
> primitive. But I have no idea whether it's primative!
We could have a boolean algebra system which supplied only NAND, in which case it would be primitive and everything else would be derived. We could equally well substitute NOR, or the pair (AND, NOT), or we could put in more than we need and use (AND, OR, NOT) etc. etc.
Marshall Received on Mon Apr 16 2007 - 16:36:19 CEST