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I am trying to find out the sum of a filed named "PercentColumn" which is calculated column based on PreviousYear and Currentyear.
The expression of the "PercentColumn "is : =IIF(Fields!PreviousYear.value = 0,0, (Fields!Currentyear.value  Fields!PreviousYear.value) /IIF(Fields!PreviousYear.value = 0,1,Fields!PreviousYear.value))
I am taking care of "Zero" in the denominator and finding the % increase and decrease. Up until here the results are populating fine. But,My next column should have a sum of this "Percent Column". So I am using sum of the above expression but its returning an error ...
Can anyone pls advise.




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sharonsql2013 (10/31/2013) I am trying to find out the sum of a filed named "PercentColumn" which is calculated column based on PreviousYear and Currentyear.
The expression of the "PercentColumn "is : =IIF(Fields!PreviousYear.value = 0,0, (Fields!Currentyear.value  Fields!PreviousYear.value) /IIF(Fields!PreviousYear.value = 0,1,Fields!PreviousYear.value))
I am taking care of "Zero" in the denominator and finding the % increase and decrease. Up until here the results are populating fine. But,My next column should have a sum of this "Percent Column". So I am using sum of the above expression but its returning an error ...
Can anyone pls advise.
Your original expression is checking for PreviousYear value twice. The second time is not required as the expression will only calculate if the PreviousYear is not 0 (by the first if).
=IIF(Fields!PreviousYear.value = 0,0, (Fields!Currentyear.value  Fields!PreviousYear.value) / Fields!PreviousYear.value)
Now if you are writing a report then you could get the "sum" in two ways. Usually you would not want to sum the percentages or to sum the PreviousYear and CurrentYear then calculate the percentage of the whole.
Case 1 : = sum(IIF(Fields!PreviousYear.value = 0,0, (Fields!Currentyear.value  Fields!PreviousYear.value) / Fields!PreviousYear.value))
Case 2: =IIF(sum(Fields!PreviousYear.value) = 0,0, (sum(Fields!Currentyear.value)  sum(Fields!PreviousYear.value)) / sum(Fields!PreviousYear.value))
Taking as test values : PreviousYear  CurrentYear  Percentage 0 100 0 (0%) 100 100 0 (0%) 200 100 0.5 (50%) 100 200 1 (100%)
Case 1 : 0 + 0 0.5 + 1 = 0.5 (50%) Case 2 : sum(PreviousYear) = 400, sum(CurrentYear) = 500 (500400) / 400 = 0.25 (25%)
Case 2 shows how the total sales etc has grown correctly.
Fitz




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The reason I have another IIf in the denominator is because we have Previous year again in denominator and this denominator can be zero too. If I do not use this IIF again , I get " #Error as output wherever the denominator is zero.




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sharonsql2013 (11/1/2013) The reason I have another IIf in the denominator is because we have Previous year again in denominator and this denominator can be zero too. If I do not use this IIF again , I get " #Error as output wherever the denominator is zero.
Seems strange as the expression in bold below will stop the second part of the iif from running. I have reproduced the code in a report without the second iif without issue.
=IIF(Fields!PreviousYear.value = 0, 0, (Fields!Currentyear.value  Fields!PreviousYear.value) /IIF(Fields!PreviousYear.value = 0,1,Fields!PreviousYear.value))
Whether you continue with the double iif or single iif the cases in the previous post will still work.
Fitz



