Import/expor. Staging to production

As shop owner/admin i want to export all changes which was made by selected person (optional) during some time frame (optional).

Export file must have db changes and file changes.

As shop owner/admin i want to import changes from file.

Import / export format must be db agnostic.

Import / export must perform correct import even if PK/FK values already present in target DB. Need to to have two strategires - add or overwrite