Hrishikesh,
Thanks man i got what happens now . actually what i was thinking was correct that data will not get append it will replace tha data. Actually we dont have test env here. So i was unable to try and i dont want trial and error on PROD db. but thanks man.
First thing i will do now is i will make small test env. so that i can do R&D like this .


Rgds
Parag