waiting for Reply...plz share your answers
Did you mean Common Table?There was such feature as Common Tables in earlier versions of NAV, I do not know is it still present, haven't checked.These were Tables that were common (shared between) to all Companies in one database.
It is a bad idea to use this functionality EVEN for reference tables (e.g. Shipping Methods and like), and by no means you should make Common any master data tables, although this is (was?) possible.