Dear Sathish,
Thanks a lot.
In addition for your reply i have written the formula as follows:
3 variable in 3 filters (date, month and year)
=if(AND(FILTER1<>"",FITLER2<>"",FILTER3<>""),DATE_VALUE(CONCATENATE(FITLER1,'/",FITLER2,"/",FILTER3,"/")),"").
I have written the value like this because, i was not using DATE_VALUE
=if(AND(FILTER1<>"",FITLER2<>"",FILTER3<>""),CONCATENATE(FITLER1,'/",FITLER2,"/",FILTER3,"/"),""), and then i was using =date_value(above cell no).
Hence I wrote the first formula in bold, i hope this reply would certainly help other as well.
Thanks,
A Sustainer