http://technology.amis.nl/2011/08/02/remove-duplicate-rows-with-oracle-sql-row_number-intelligent-and-efficient-data-cleansing/?utm_source=rss&utm_medium=rss&utm_campaign=remove-duplicate-rows-with-oracle-sql-row_number-intelligent-and-efficient-data-cleansing Fri, 12 Apr 2013 10:04:09 +0000 hourly 1 http://wordpress.org/?v=3.5.1 http://technology.amis.nl/2011/08/02/remove-duplicate-rows-with-oracle-sql-row_number-intelligent-and-efficient-data-cleansing/#comment-6848 Martin Schapendonk Wed, 03 Aug 2011 14:45:55 +0000 http://technology.amis.nl/blog/?p=13116#comment-6848 Alternative without analytic functions:
delete from medal_score
where rowid in (
select rowid
from medal_score t
where exists (
select 1
from medal_score
where oly_id = t.oly_id
and cty_id = t.cty_id
and medal = t.medal
and rowid > t.rowid
)
);
 
 

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