Delete duplicated rows

Delete duplicated rows.

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Warning: Review and test in a non-production environment before running.

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delete from PENSIONERIM
 where rowid in (select rowid 
                   from (select rowid,
                                row_number()
                                over 
                                (partition by PensionerId,fund order by PensionerId,fund) dup
                           from PENSIONERIM
                          where funddate=to_date('01/12/2014','dd/mm/yyyy'))
                  where dup > 1);