On Thu, 25 Jun 2009 01:10:23 +0530 wrote >Well then depending upon your tool then I would suggest using a sql >interface as suggested by Joe. > >Many of the better tools will let you form join queries that can acheive >the benefits of a single table without the costs. Ok, everybody seems to suggest the same. I have 65 tables, and if I assume on average that each table has around 10 attributes/columns, I will have to arrive at a single very big table with more than 500 attributes. Do you really mean that? If yes, I seriously feel we have a very inefficient(atleast from a layman point of view) way of performing the Data mining operations. Aren't there any other better way of dealing this very common issue? Regards, Michael