know how a particular column value has evolved in History column table

Hi,

     I want to track the history of each column individually in a History table. Is there a way to do it?

eg:-

KEY VALUE ENTITY

AA     1         XX

BB     2         YY

UPDATE table set value=3 where key='BB'

UPDATE table set entity='ZZ' where key='BB'

UPDATE table set value=2 where key='BB'

KEY VALUE ENTITY

AA     1         XX

BB     2         YY

BB     3         YY

BB     3         ZZ

BB     2         ZZ

I want to know how the value ENTITY having the key='BB' has evolved

Request you to help.

Thanks,

Athrey