1. A method for classifying and selecting records, in which records are received, the fields of which contain values, a value contained in at least one specified field is read ( 1002 ) from at least one received record, the records are selected to classes on the basis of a classification structure, and which is characterized in that at least one read field is identified, a field-specifically ordered classification structure, corresponding to the identified field is selected ( 1001 ), a reference value according to the value contained in the field is searched ( 1004 ) from the selected classification structure, at least one class, according to the conditions of the classification structure, corresponding to the reference value is read ( 1007 ) from each of the selected classification structures, and the record is selected ( 1112 ) to the class read from the field-specifically ordered classification structure.