In the following example, the QUERY_HEADER clause specifies that  VAX
  DATATRIEVE  use  TOTAL  PRICE  as  the  column  header  for the field
  TOTAL_PRICE.

  TOTAL_PRICE             DATATYPE IS VIRTUAL FIELD
                          COMPUTED BY DTR AS
                              "UNIT_PRICE * QUANTITY"
                          QUERY_HEADER FOR DTR IS "TOTAL PRICE".