SAS support website
http://support.sas.com/ SEARCH facility has several technical documents and conference papers on this topic - also, I did a Google advanced using the argument below to find reference items related to your post:
append sas data to oracle table site:sas.com
However, there is at least one SAS TECHNOTE with a related HOTFIX - see link below, in case it may apply:
Problem Note 16338: Using PROC APPEND to insert rows into an Oracle table may report an error as a note
http://support.sas.com/kb/16/338.html
Scott Barry
SBBWorks, Inc.