16.20 - Example: FILL Clause is Omitted - Teradata Database - Teradata Vantage NewSQL Engine

Teradata Vantageā„¢ Time Series Tables and Operations

Product
Teradata Database
Teradata Vantage NewSQL Engine
Release Number
16.20
Published
March 2019
Content Type
Programming Reference
Publication ID
B035-1208-162K
Language
English (United States)
Last Update
2019-05-02

If there are timebuckets in the source data with missing values and the FILL clause is omitted, the timebuckets with missing values are omitted from the result set.

The example shows the results of a query when the FILL clause is omitted and there is missing data in the source table:

SELECT $TD_TIMECODE_RANGE, $TD_GROUP_BY_TIME, BUOYID, AVG(TEMPERATURE)
FROM OCEAN_BUOYS
WHERE TD_TIMECODE BETWEEN TIMESTAMP '2014-01-06 09:45:00' AND TIMESTAMP '2014-01-06 11:45:00'
AND BUOYID=44
GROUP BY TIME (MINUTES(15) AND BUOYID)
ORDER BY 2,3;

Result:

TIMECODE_RANGE GROUP BY TIME(MINUTES(15)) BUOYID AVG(TEMPERATURE)
('2014-01-06 10:00:00.000000+00:00', '2014-01-06 10:15:00.000000+00:00') 2 44 49
('2014-01-06 10:30:00.000000+00:00', '2014-01-06 10:45:00.000000+00:00') 4 44 43
('2014-01-06 10:45:00.000000+00:00', '2014-01-06 11:00:00.000000+00:00') 5 44 43