I would like to know the table in the database that maintains the historical changes in CA Software Asset Manager 4.2.4.
The changes are stored in the table products_h.
In order to see the historical changes for a particular product, run the following:
select * from products_h where orig_product_id = (select product_id from products where description = 'product name')
Replace product name with the exact product name you are clicking on History for.