Groups > comp.lang.java.programmer > #3793

Re: SQL Puzzle - too many dimensions

From	Roedy Green <see_website@mindprod.com.invalid>
Newsgroups	comp.lang.java.programmer
Subject	Re: SQL Puzzle - too many dimensions
Date	2011-05-07 23:32 -0700
Organization	Canadian Mind Products
Message-ID	<a0ecs6tjngbukgu3rq539hkfuqbfsfl33r@4ax.com> (permalink)
References	<tnibs6hnfdp2cav0u74d8heeqsdkvg1c6a@4ax.com>

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On Sat, 07 May 2011 16:13:52 -0700, Zapanaz
<http://joecosby.com/code/mail.pl@foo.com> wrote, quoted or indirectly
quoted someone who said :

>My job is to come up with one SQL query which will return the
>highest-rated version of each song.


You could create a query ordered by descending rating and just read
the first record.

I presume there is some sort of max function that returns the max
value over a set of some field.

Find the max, then do a query for match on that max value.
-- 
Roedy Green Canadian Mind Products
http://mindprod.com
How long did it take after the car was invented before owners understood 
cars would not work unless you regularly changed the oil and the tires?
We have gone 33 years and still it is rare to uncover a user who 
understands computers don't work without regular backups.

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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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