The Teradata Database implementation of ANSI/ISO Temporal tables and syntax is extended to include the following non-ANSI standard capabilities:
ANSI temporal tables in Teradata Database can have more than two derived period columns.
The CONTAINED IN qualifier can be used to query ANSI system-time tables in Teradata Database. For more information on CONTAINED IN, see “Querying ANSI System-Time Tables” on page 37.
ANSI temporal valid-time tables in Teradata Database can be queried using the same temporal qualifiers as can be used for querying ANSI system-versioned system-time tables (AS OF, BETWEEN..AND, FROM...TO, and CONTAINED IN).
ANSI temporal valid-time tables in Teradata Database require [AS] VALIDTIME as part of the column specification in the table definition.
Temporal qualifiers and constraints used on Teradata’s proprietary temporal tables can be used with the Teradata Database implementation of ANSI temporal tables. For more information about these constraints and qualifiers, see Temporal Table Support.