Filter a dataset with the value of other dataset or many to many lookup function ?

Hi,

I am new to this forum.

In my report i am getting a valuefrom the first dataset say

Item  Start Range   End range      Total Sum of item between range from onother dataset (NEED TO ACHEIVE THIS)

a           100            200               1500

b            200           220               1600

how can i achieve this result?

is there any lookup function that i can lookup with a range ? (like 100 to 200)

Is there any possiblity to filter the other dataset with the value range dynamically (Like 100 to 200 range)

I have tried to pass it throug the parameters but i failed.

I have created the subreports but i do no how to pass only total to main report....... and the output with the subreport is taking more than 1 hour to display the data.

i am using around 9 datasets from deff databses.

Thanks in advance.