Hi
Is the date definitely in the format 2014-10-17 ?
Are you loading this data into a field of datatype varchar or date ?
try to_char(to_date(colume_name, 'yyyy-mm-dd')) in case of loading into a varchar field.
if you are loading into a field of datatype date then try using to_date(column_name, 'yyyy-mm-dd')
kind regards
Raghu