Thankyou Carolyn for your abrupt response i really appreciate it, Actually my problem is little complex( may be simpler for you) lets take an example of a table organization. I have almost 40 columns in it. I broke it into two tables Organization 1(containing the 10 columns which are commonly used.) and Organization 2(which contains the other 30 columns which are not commonly used but surely are organization related info.) now when showing to user to edit the information i take the join and display the data. Now applying the versioning concept of yours make it difficult to implement in such scenario for me. Now i have all the tables having the same summary detail concept. Could you please help me in this scenario or suggest a better alternative.