Math on query lines

[bstice]

Is there a way to subtract each line for the preceding line in a query. I see that people have figured out how to do a running total, but I just interested in the difference between a line and its preceding line. Any help is appreciated and I always award reputation points. THanks

Brennan

 

[pbaldy]

One method here:

http://www.baldyweb.com/PrevValue.htm