Example: MIN and MAX Aggregations in a Sequenced Query - Analytics Database - Teradata Vantage

Temporal Table Support

Deployment
VantageCloud
VantageCore
Edition
Enterprise
IntelliFlex
VMware
Product
Analytics Database
Teradata Vantage
Release Number
17.20
Published
June 2022
Language
English (United States)
Last Update
2023-10-30
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lifecycle
latest
Product Category
Teradata Vantage™

MIN and MAX functions can be used in sequenced aggregations with temporal tables, however it is important to apply them to appropriate columns. For the aircraft service example, the information in the Charge column is not a state value. Applying MIN and MAX to this column in a time dependent sequenced aggregation would give results that are easily misinterpreted or not meaningful.

However, it would be meaningful to ask for the minimum and maximum number of workers assigned to all jobs combined at any time:

SEQUENCED VALIDTIME
SELECT id,
       min(NumWorkersAssigned) as Minworkers,
       max(NumWorkersAssigned) as Maxworkers
FROM aircraft_service
GROUP BY 1
ORDER BY VALIDTIME;
ID Minworkers Maxworkers VALIDTIME
123 5 5 ('11/01/04', '11/01/05')
123 3 5 ('11/01/05', '11/01/06')
123 1 5 ('11/01/06', '11/01/07')
123 1 5 ('11/01/07', '11/01/08')
123 1 1 ('11/01/08', '11/01/09')