Re: histogram

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От David Johnston
Тема Re: histogram
Дата
Msg-id 02a801cc077f$6bca68d0$435f3a70$@yahoo.com
обсуждение исходный текст
Ответ на Re: histogram  (Rob Sargent <robjsargent@gmail.com>)
Ответы Re: histogram
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Given that you are actively implementing the code that uses the 1 and 2 I
don't see how it is that egregious.  When generating calculated fields it is
cleaner than the alternative:

Select trunc(distance * 10.)/10., count(*)
From doc_ads
Group by (trunc(distance * 10.))
Order by (trunc(distance * 10.))

It would be nice if you could do:

Select trunc(distance * 10.)/10. AS bin, count(*) AS frequency
From doc_ads
Group by bin
Order by bin

But I do not believe that is allowed (though I may have my syntax wrong...)

David J.

>> re: 1 and 2. They're horrible (imho) reference to the attributes of the
returned tuple. Or at best an exposure of the implementation. :)

>>Joel Reymont wrote:
>>> I think this should do what I want
>>>
>>>     select trunc(distance * 10.)/10., count(*)
>>>     from doc_ads
>>>     group by 1 order by 1
>>>
>>>   Thanks, Joel



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