This section describes the major differences between Teradata’s proprietary implementation of temporal tables and syntax, which is described in this document, and Teradata’s implementation of ANSI/ISO compliant temporal tables, which is described in Teradata Vantage™ - ANSI Temporal Table Support , B035-1186 . It also describes three methods that can be used to convert transaction-time tables into ANSI-compliant system-versioned system-time tables.