Understanding the Base Table and Non-base Tables

A base table is a table that contains all the keys by which all other tables in the archive object is archived from. Each archive object can have one and only one base table. You can define the selection criteria to archive from the base table.

Non-base tables are joined together by common keys. In each archive object, non-base tables are archived based on the archived data of the base tables. You don't need to define archive criteria for non-base tables.