Thanks to Hardy & Koen for your immediate replies.
yes it is not a live server as of now, but I am planning to implement the changes to the live server whereas it should be
tested in various stages
"Development Integration Server" (DIS)
"System Integration Server" (SIS)
"Performance Testing Server" (PTS)
Finally to the "Live Server" (Live)
yes, as of now since that is a mapping table and Column2 and Column3 refers to each Master Table respectively
and the values in these columns are the IDs of the appropriate master tables, thus these two columns has the vast usage and there is no point to think about "out of Leverage"
Thanks for all your Inputs, I would test this with my DIS first, then let you know for sure..