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Re: GROUP BY [was: Comments list comments]

From: Seaborne, Andy <andy.seaborne@hp.com>
Date: Mon, 21 Mar 2005 17:07:09 +0000
Message-ID: <423EFF3D.5050607@hp.com>
To: Dan Connolly <connolly@w3.org>
CC: RDF Data Access Working Group <public-rdf-dawg@w3.org>

Dan Connolly wrote:
> On Mon, 2005-03-21 at 16:04 +0000, Seaborne, Andy wrote:
> 
>>Matters arising from the comments list:
> 
> [...]
> 
>>2/ GROUP BY
>>
>>Request for SQL-like GROUP BY in addition to ORDER BY.  GROUP BY allows the 
>>application of aggrgeate functions which is more problematic than ORDER BY (that 
>>only chnages the order of solutions, it does not remove, add or change 
>>solutions).  It's use with aggregation functions like sum(), count() that is 
>>tricky because of defining what is being counted (names or individuals).
>>
>>COUNT() can lead to a significant decrease in network bandwidth but I have not 
>>seen a proposal as to what it means for RDF query that explciitly addresses the 
>>closed world assumptions.

-1

Counting would need a lot more consideration before inclusion.

Suggest we get a use case then add to postponed issues unless the use case is 
very compelling.

	Andy

>>
>>
>>	Andy
> 
> 
Received on Monday, 21 March 2005 17:07:53 GMT

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