Time Series Expansion Support - 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™

Time series expansion is indicated using the EXPAND ON clause for SELECT statements, and provides the ability to create a regular time series of rows based on period values in the input rows. The intent is to expand a period column and produce value equivalent rows, one for each granule in a given period of interest.

For example, suppose an application uses PERIOD(DATE) values to record inventory data of slowly moving items. A SELECT statement can use the EXPAND ON clause to expand the period values by one-week intervals to get the moving average by week of the inventory cost for a specified period of interest.

To expand the system-generated VALIDTIME column that is automatically appended to the result set of a SEQUENCED VALIDTIME query, the EXPAND ON clause can include the VALIDTIME column name in the expand expression.