Everything in your select statement either has to be in the group by statement or aggregate function(sum, max, min, avg, etc). That is why you got that error.
Sql = "select SUBJECTS, ORG_LEVEL_1, RECORD_OWNER, DELETION_DATE "_
& "from XML_EXPORT "_
& "gruop by SUBJECTS,ORG_LEVEL_1, RECORD_OWNER, DELETION_DATE ;"
What are you trying to do by grouping? If we knew more about what you where trying to do we may be able to help you get the rs you want.