List all the columns that are required for managing or maintaining an incremental data load.

Typical columns needed for incremental load management include:

1. Primary key or unique identifier – to match records.
2. Timestamp of last update or load – to detect changes.
3. Change flag or status column – to indicate insert, update, delete.
4. Version or revision number – for audit and conflict resolution.
5. Load batch ID – to group records by load run.

These columns allow the ETL process to identify new or changed rows and apply them efficiently to the target.