ALTER TABLE Statement (ANSI Valid-Time Table Form) | Teradata Vantage - ALTER TABLE (ANSI Valid-Time Table Form) - Analytics Database - Teradata Vantage

ANSI 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 Vantageā„¢

Temporal syntax for ALTER TABLE allows you to create ANSI temporal valid-time tables from existing tables. It can be used to modify existing tables that may have already been created having DateTime columns that manually track the effective period during which information in the row is effective.

Adding valid time to the table involves these ALTER TABLE operations:
  • Adding or altering the two DateTime columns that will serve as the beginning and ending bounds of the valid-time period
  • Adding a valid-time derived period column to the table, and designating the derived period column VALIDTIME