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Re: SQL Puzzle - too many dimensions

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From	Robert Klemme <shortcutter@googlemail.com>
Newsgroups	comp.lang.java.programmer
Subject	Re: SQL Puzzle - too many dimensions
Date	Sun, 08 May 2011 13:08:59 +0200
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On 08.05.2011 04:00, Lawrence D'Oliveiro wrote:
> In message<tnibs6hnfdp2cav0u74d8heeqsdkvg1c6a@4ax.com>,  wrote:
>
>> But anyway, this is in an Oracle DB, and they don't let you include
>> columns in a group-by query that aren't explicitly group-by that way.
>
> Sounds like as good a time as any to move away from Oracle.

That's ridiculous.  This query can be easily done with Oracle.  I don't 
have an Oracle handy but this should work:

select sv.song_version_id
  from song_versions sv
  where sv.rating =
   (select max(rating)
     from song_versions sm
     where sm.song_id = sv.song_id
   )

Apart from that there are the approaches presented by Arved (join and 
analytic SQL).

Kind regards

	robert

-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/

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SQL Puzzle - too many dimensions Zapanaz <http://joecosby.com/code/mail.pl@foo.com> - 2011-05-07 16:13 -0700
  Re: SQL Puzzle - too many dimensions Lawrence D'Oliveiro <ldo@geek-central.gen.new_zealand> - 2011-05-08 14:00 +1200
    Re: SQL Puzzle - too many dimensions Robert Klemme <shortcutter@googlemail.com> - 2011-05-08 13:08 +0200
      Re: SQL Puzzle - too many dimensions Lawrence D'Oliveiro <ldo@geek-central.gen.new_zealand> - 2011-05-09 00:01 +1200
        Re: SQL Puzzle - too many dimensions Lew <noone@lewscanon.com> - 2011-05-08 08:08 -0400
  Re: SQL Puzzle - too many dimensions Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-05-08 01:02 -0300
    Re: SQL Puzzle - too many dimensions Robert Klemme <shortcutter@googlemail.com> - 2011-05-08 13:03 +0200
      Re: SQL Puzzle - too many dimensions Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-05-08 11:14 -0300
        Re: SQL Puzzle - too many dimensions Robert Klemme <shortcutter@googlemail.com> - 2011-05-08 23:37 +0200
    Re: SQL Puzzle - too many dimensions Zapanaz <http://joecosby.com/code/mail.pl@foo.com> - 2011-05-08 16:06 -0700
      Re: SQL Puzzle - too many dimensions Robert Klemme <shortcutter@googlemail.com> - 2011-05-09 22:10 +0200
        Re: SQL Puzzle - too many dimensions Lawrence D'Oliveiro <ldo@geek-central.gen.new_zealand> - 2011-05-10 13:50 +1200
          Re: SQL Puzzle - too many dimensions Robert Klemme <shortcutter@googlemail.com> - 2011-05-10 00:06 -0700
            Re: SQL Puzzle - too many dimensions Lawrence D'Oliveiro <ldo@geek-central.gen.new_zealand> - 2011-05-13 22:55 +1200
              Re: SQL Puzzle - too many dimensions Robert Klemme <shortcutter@googlemail.com> - 2011-05-15 18:52 +0200
          Re: SQL Puzzle - too many dimensions Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-05-10 06:35 -0300
            Re: SQL Puzzle - too many dimensions Lawrence D'Oliveiro <ldo@geek-central.gen.new_zealand> - 2011-05-13 22:57 +1200
              Re: SQL Puzzle - too many dimensions Lew <noone@lewscanon.com> - 2011-05-13 07:45 -0400
              Re: SQL Puzzle - too many dimensions Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-05-15 13:09 -0300
                Re: SQL Puzzle - too many dimensions Robert Klemme <shortcutter@googlemail.com> - 2011-05-15 18:56 +0200
  Re: SQL Puzzle - too many dimensions Roedy Green <see_website@mindprod.com.invalid> - 2011-05-07 23:32 -0700
    Re: SQL Puzzle - too many dimensions Roedy Green <see_website@mindprod.com.invalid> - 2011-05-07 23:36 -0700
      Re: SQL Puzzle - too many dimensions Lawrence D'Oliveiro <ldo@geek-central.gen.new_zealand> - 2011-05-08 20:43 +1200
        Re: SQL Puzzle - too many dimensions Robert Klemme <shortcutter@googlemail.com> - 2011-05-09 01:27 -0700
  Re: SQL Puzzle - too many dimensions Lew <noone@lewscanon.com> - 2011-05-08 07:45 -0400

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