Comments on: MIN(DISTINCT X) http://laurentschneider.com/wordpress/2007/10/mindistinct-x.html Oracle Certified Master Mon, 01 Dec 2008 19:24:45 +0000 http://wordpress.org/?v=2.6.5 By: Laurent Schneider http://laurentschneider.com/wordpress/2007/10/mindistinct-x.html#comment-5171 Laurent Schneider Tue, 30 Oct 2007 07:24:50 +0000 http://laurentschneider.com/wordpress/2007/10/mindistinct-x.html#comment-5171 of course Gary, thanks for making this clear, my point was using DISTINCT to achieve a better performance when ALL and DISTINCT are equivalent, as for min, MIN(ALL X) is always the same as MIN(DISTINCT X) You may then wonder why MIN and MAX accept DISTINCT but MEDIAN does not... of course Gary, thanks for making this clear, my point was using DISTINCT to achieve a better performance when ALL and DISTINCT are equivalent, as for min, MIN(ALL X) is always the same as MIN(DISTINCT X)

You may then wonder why MIN and MAX accept DISTINCT but MEDIAN does not…

]]> By: Gary http://laurentschneider.com/wordpress/2007/10/mindistinct-x.html#comment-5156 Gary Mon, 29 Oct 2007 22:04:29 +0000 http://laurentschneider.com/wordpress/2007/10/mindistinct-x.html#comment-5156 Whether it is appropriate to your aggregation function is a different matter. MIN is unaffected, but AVG(DISTINCT col) and AVG(col) would return different results. Whether it is appropriate to your aggregation function is a different matter.
MIN is unaffected, but AVG(DISTINCT col) and AVG(col) would return different results.

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