例: TD_SUM_NORMALIZE_OVERLAPの使用 - Teradata Database - Teradata Vantage NewSQL Engine - 算術演算子、TD_SUM_NORMALIZE_OVERLAP関数、例。

WITH subtbl(flight_id, charges, duration) AS
     (SELECT flight_id, charges, duration FROM FlightExp)
SELECT * 
     FROM TABLE (TD_SYSFNLIB.TD_SUM_NORMALIZE_OVERLAP(NEW VARIANT_TYPE(subtbl.flight_id),
                 NEW VARIANT_TYPE(subtbl.charges),          
                 subtbl.duration)
RETURNS (flight_id INT, cnt 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;