Sum all row exclude the negative numbers in Oracle Reports

Question

I have one table with 10 rows. I want to sum the values in a particular column. But I want to exclude all the negative numbers.

How can I sum just the positive numbers and ignore the negative numbers?

This is my pictures example:

Answer 1

You can do something like

SELECT SUM( case when column_name > 0 
                 then column_name
                 else 0
              end ) sum_of_non_negative
  FROM table_name