Sum Period + Sum Previus Period

[#1]

Hi,

I Have a chart with 3 colums, period, product, sum(qty)

and one list box with period.

This work perfect, now need add a column whit the sum of qty of previus period for each product.

Any idea?

Thanks Regards

César Estrada

[robert_mika]

Try

above(sum(qty))

[renjithpl]

may be like this,

Sum {<Period = {"$(=(MAX(Period)-1))"}>}qty)

[#4]

Hi Renjith, when paste u formula suggested, on the expression, tell me "garbage after expression", i cant use u formula on a expression or is for another use

Thanks

[#5]

Hi Robert,

I try for example, sum between 2014 jan to 2015 jan, for each product and show this in one column, and 2015 feb in another column.

When chose 201502 in the list box, sum only 201502, but de another sum is 0.

U can please make one example for me

Regards

César Estrada

[#6 · Accepted solution]

Hi, Thanks both, the formula that work for me is

= sum({<Period= {">=1(=min(Period))<=$(=max(Period)-1)"}> } qty)

Thanks Regards