Example: Using TD_NORMALIZE_OVERLAP_MEET - Teradata Vantage

WITH subtbl(flight_id, duration) AS
   (SELECT flight_id, duration FROM FlightExp)
SELECT *
FROM TABLE (TD_SYSFNLIB.TD_NORMALIZE_OVERLAP_MEET(NEW VARIANT_TYPE(subtbl.flight_id),
 RETURNS (flight_id INT, duration PERIOD(TIMESTAMP(6) WITH TIME ZONE), NrmCount INT)                                                    subtbl.duration)
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, duration, NrmCount) ORDER BY 1,2;