Simple calculations of two columns (addition, subtraction, ...)

Question

Hi,
I'm a job starter and working with Oralce Discoverer 10gR2 for the first time. I want to create a simple report. So I imported a view that looks like this:
create or replace view v_report_inventories_bc_group as
select a.the_date,
a.entity,
sum(a.histor_statutory_value) as histor_statutory_value
from t_r2_facts a
group by a.entity, a.the_date
now I've generated a cross tab that looks like this:
31.12.07 31.01.08 29.02.08 31.03.08
group 100 200 300 400
company1 70 150 200 300
company2 30 50 100 100
The problem is to show the simple difference between the last to months. Furthermore there are other calculations...
How should I achieve this?
Any advice would be very appreciate!
Regards,
Steffen

Answer 1

Hi,
If I'm understanding your question correctly...
When you brought this view into the Admin Edition it should have asked you if you wanted to use the Default Date Hierarchy. Assuming you did there should be a value called the_date Month under the items in this folder within Desktop/Plus. You would want to add that item in to the top portion of your crosstab and it will then break out the data by month.
To Subtract Column A from Column B you would create a calculation. The below link has a section called "How to create calculations" which should be of assistance.
Thanks,
Jeff
http://download.oracle.com/docs/html/B13915_04/calculations.htm#i1012748
Message was edited by:
Jeff Hohman