Create dynamic internal table with dynamic structure

I have an internal table itab1 that have 12 amount fields from period1 thru period12. I need to create a dynamic table with dynamic structure for the period column if the total amount of each column is > 0. Any idea on how to do that?

For example if my itab1 has 20 rows and the sum of period1 = 35, sum of period2 = 0, sum of period3 = 5, sum of period4 =0, sum of period5 = 2 then I need to create a dynamic structure for the field column that have the total > 0, i.e structure struct1 have field period1, period3 and period5 only. Then I will need to load the data to itab2 from itab1. Can someone help.

Thanks. I am on 4.7 and will upgrade to ERP 6.0 soon.