Re: Nulls, integrity, the closed world assumption and events
From: Keith H Duggar <duggar_at_alum.mit.edu>
Date: 23 Jan 2007 17:34:23 -0800
Message-ID: <1169602462.930179.273490_at_s48g2000cws.googlegroups.com>
Date: 23 Jan 2007 17:34:23 -0800
Message-ID: <1169602462.930179.273490_at_s48g2000cws.googlegroups.com>
Neo wrote:
> dbd's tree view of pizza:
> pizza
> id
> 12345
> crust
> chicago
> cheese
> mozzarella
> provolone
> topping
> peppers
> mushrooms
> pepperoni
>
> dbd query:
> (& (get pizza instance *)
> (get * topping (!= (get topping instance *)
> peppers)))
Now write the dbd query for all cheeses matched with Pepperoni in at least one pizza.
Keith -- Fraud 6 Received on Wed Jan 24 2007 - 02:34:23 CET