Example: Using TD_SUM_NORMALIZE_OVERLAP_MEET - Teradata Vantage

WITH subtbl(flight_id, charges, duration) AS      
    (SELECT flight_id, charges, duration FROM FlightExp) 
SELECT * FROM TABLE (
     TD_SYSFNLIB.TD_SUM_NORMALIZE_OVERLAP_MEET(NEW VARIANT_TYPE(subtbl.flight_id),
                                               NEW VARIANT_TYPE(subtbl.charges),
                                                                 subtbl.duration)
   RETURNS (flight_id INT, charges FLOAT,
            duration PERIOD(TIMESTAMP(6) WITH TIME ZONE))
   HASH BY flight_id     /* input data is redistributed on column, flight_id */
   LOCAL ORDER BY flight_id, duration)     /* input data is sorted on these columns */
   AS DT(flight_id, charges, duration) ORDER BY 1,3;