Re: Storing data and code in a Db with LISP-like interface
From: Bob Badour <bbadour_at_pei.sympatico.ca>
Date: Fri, 21 Apr 2006 14:49:06 GMT
Message-ID: <Ch62g.63678$VV4.1190984_at_ursa-nb00s0.nbnet.nb.ca>
Date: Fri, 21 Apr 2006 14:49:06 GMT
Message-ID: <Ch62g.63678$VV4.1190984_at_ursa-nb00s0.nbnet.nb.ca>
Pascal Bourguignon wrote:
> Bob Badour <bbadour_at_pei.sympatico.ca> writes:
>
>>Can it handle n-ary relations? Like "John bought 10 apples each at
>>10cents" ?
>
>
> Of course:
>
> bought(john,10,apple,10,cent).
>
> How many apple did john buy?
>
> ?- bought(john,HowMany,apple,_price,_money).
Thank you, that's much more revealing than 100 binary relations.
Does prolog summarize the results? Or does it list each individual purchase?
Consider:
bought(john,10,apple,10,cent).
?- bought(john,HowMany,apple,_price,_money).
bought(john,3,apple,15,cent).