select N.*,C.* 
from  t_tm1_export_import_view_copy AS C 
 left join t_tm1_export_import_view_neu AS N
ON   C.f_transferID = N.f_transferID
 AND C.f_dim = N.f_dim
 AND C.f_elementNr = N.f_elementNr
where N.f_dim is NULL