What is the best way to produce running differences?
I have a table: Tests
The input layout is on a portal and it works great. (See picture below)
I have produced a sub-summary report below that also works great.
But, I want to add a field that shows the difference in Values between
succeeding dates. For example, the June 15, 2002 'diff' field would be to the right of
Value and show 22-5.2=16.8 .
What is the best way to do this?