Thanks Ashish. I appreciate your effort.
I do not want to use a parameter as new rows will be added to the dataset and it should reflect in the filter as well. Moreover, there are categorical fields where aggregation cannot be done.
Proj Name Value Cat A 2885 x A 3078 x A 1979 y B 3483 t B 2056 s C 1984 p C 4021 q C 2205 r
If my selection in the drop down is C, it should display x,y,p,q,r.