“Diffing” objects from a relational database

Question

Our win32 application assembles objects from the data in a number of tables in a MySQL relational database. Of such an object, multiple revisions are stored in the database.

Answer 1

I would think about some sort of common text representation of the objects and let the texts compare with an existing diffing tool like WinMerge.

I see no need to invent diffing by myself since there are already plenty of nice tools I can use.