Enable database timelines for row versioning
SET TIMELINE ON | OFF
ALTER DATABASE, CLEAR TIMELINE, Database Timelines Commands and Functions, Database Timelines (Video), LIST TIMELINE, MetaData Editor, ROLLBACK TIMELINE, SET SYSTIMELINE, SET TIMESTAMP, Systimeline System Table, TIMELINE(), Timeline Section Attributes, Understanding Database Timelines
Database timelines provide row versioning for Lianja database applications. Whenever a change is made to a table that is timeline enabled, delta changes are automatically recorded for each transaction. Changes made to any tables that are timeline enabled can be undone much like you would undo changes to program code that you edit in a text editor. SET TIMELINE is OFF by default.
Timelines can also be enabled for a specific database in its metadata. In the MetaData Editor specify the Attribute as timeline and the Value as on. Alternatively, use the ALTER DATABASE command as shown below.
set timeline on // Or set in the database metadata to always apply to the specified database alter database southwind metadata "timeline=on"