How to get updated values from table in mysql without having timestamp

I have a list of attributes where i will insert all the attributes in to the table for the first time. for next time on wards, I will update only few attributes to table only those attributes list I want.

For example, Table has columns has brand, size etc.

For the first time data will be,

Brand => Nike
size => S

Afterwards might be,

Brand => Puma
size => S

I want to get only brand i.e, updated data from the table.