I am pretty green at this stuff and have a problem with what I thought was a simple select and calculate SQL Formula.
The issue being is that in my table I have a lot of zero values, sound's wierd I know but this is how it is.
The formula is to calculate a percentage marin based on two columns these being Total and Costs, whilst my simple formula works if there's a value, when theres a zero value absolutely nothing works.
The formula I am using is this ((Total-Costs)/Total)*100
Can anyone advise this greenhorn how to overcome the zero value issue?
You could do something like this
SELECT COALESCE((Total- Costs / NULLIF(Total,0))*100, 0)
If Total has a 0 in it, you'll get a divide by zero error. You must catch these using a CASE statement, like so
SELECT
CASE WHEN Total = 0 then 0 else ((Total-Costs)/Total)*100 END AS Percentage
FROM
Tbl
Related
How do I get the total of the group inside a row item?
I have tried Fields!Sales.Value/SUM(Fields!Sales.Value) but it returns 1 instead of the row_amount/group_total the report returns row_amount/row_amount
PS: Data comes from a SSAS cube. I made picture bellow1 to summarize what I wanna do
You could potentially just compare the values by the ReportItems. That is, you can specify a name for the sales textbox and for the totalsales textbox and do the comparison using those values. The following expression would likely work as intended.
= (ReportItems!SalesTextbox.Value / ReportItems!SalesTotalTextbox.Value) * 100.0
The other thing to consider with this is that if your result is 1, you may be dealing with integer division from your data. Make sure the data being returned is coming in with a double or decimal datatype, not an integer. It may work as you have it currently if you get the datatype corrected.
You also need to handle "divide by Zero' errors. Using an "=IIf (denominator = 0, 0, numerator/denominator) doesn't work since an "IIf" function evaluates both the "then" and the "else" and will still return an error. We use a bit of custom code that I found on SO (I wish I could remember where it came from so I could give credit where it's due).
Public Function HandleDivideByZero(ByVal numerator As Decimal, denominator As Decimal) As Decimal
If denominator = 0 Then
Return 0
Else
Return numerator / denominator
End If
End Function
I have a column which should calculate some numbers and sometimes it gives me the correct sum and sometimes it doesn't. I don't know why! Can someone please point me in the right direction?
I used this expression:
=Sum(Fields!TotalEmployees.Value)
When I don't choose something from filters on the top , it will give me the correct sum:
And when I choose something from the filters on the top, for example between 2 dates, it will give me wrong the sum:
Parameters & Body of report :
#EndDateFrom
#EndDateTo
Yeah, you need to be wary of your grouping. I'm willing to bet you're stuck inside of a group which is filtering your results.
If you are using Report Builder 2016, you can right click your last row and select "Add Total". This will generally automatically generate a row that gets the sum of all fields in your group.
i solved this issue with changing my query ,where all calculating (AVG , Sum &.. ) happens in query , instead reporting services do it for me .. after that i got the correct number:
SELECT t1.Departments, count(t1.id), avg(t1.age),sum(t1.TotalEmployees)/count(t1.id)
AS TotalEmpl FROM (<current_query>) AS t1 <br> GROUP BY t1.Departments
I'm looking at doing a calculation expression in SSRS but I've become unstuck.
I'm trying to calculate when a field equals a specific value, then return a percentage calculation.
This is what I've tried so far:
=SUM(IIF(Fields!Alert.Value="Red",(FormatPercent(Count(Fields!Sales.Value) / 6532 ,0)))SUM(IIF(Fields!Alert.Value="Yellow",(FormatPercent(Count(Fields!Sales.Value) / 2541 ,0)))SUM(IIF(Fields!Alert.Value="Green",(FormatPercent(Count(Fields!Sales.Value) / 1025,0)))
Obviously this is incorrect and doesn't work. The expression needs to include all 3 colours.
UPDATED see if this works.
UPDATED per requested. I put the statement in the last False part, but I'm not sure if this is what you really want.
UPDATED again. Added False part to the last IIF statement.
UPDATED: Removed the SUM function. Try this to see if it works. Your IIF statement didn't have any False parts. Also, just SUM once around the whole statement if you want it summed. Not knowing your data, I'm not sure if you want the % summed up.
=IIF(Fields!location.Value="East" AND Fields!Alert.Value="Red",(FormatPercent(Count(Fields!Sales.Value) / 6532 ,0)),IIF(Fields!Alert.Value="Yellow",FormatPercent(Count(Fields!Sales.Value) / 2541 ,0),IIF(Fields!Alert.Value="Green",FormatPercent(Count(Fields!Sales.Value) / 1025,0),0)))
Currently I am trying to average a set of numbers, but with certain conditions.
Is it possible to use an iif() within an avg() and return the correct result?
Furthermore, as of now my computations return a decimal returned to a power (8.9267....E -05).
I tried circumventing the AVG function by conditionally summing and then dividing by a conditional count but it gives me the same results.
Can someone explain why this is returned and offer help?
Currently I have:
=avg(iif((This_case) AND (That_case) AND (This_conditional)
, Fields!ResponseRate.Value
, 0))
Essentially I want the average ResponseRate if certain conditions are met.
The sum function works fine for the conditions but the average doesn't.
You can definitely use IIf within Avg and get the correct results.
Do you want to exclude the False values from the calculation entirely?
In your example you're still including them, just setting them to 0 and hence still including them in the calculation. This might explain your unexpected results.
If you want to exclude them entirely use Nothing instead of 0.
Edit after comment
You can nest an expression in another IIf statement and check for NULL values using IsNothing.
Say your condition average expression is:
=Avg(IIf(Fields!ID.Value > 5, Fields!value.Value, Nothing))
You can return 0 for NULL values with something like:
=IIf(IsNothing(Avg(IIf(Fields!ID.Value > 5, Fields!value.Value, Nothing)))
, 0.0
, Avg(IIf(Fields!ID.Value > 5, Fields!value.Value, Nothing)))
I'd like to add my two cents to this one, a little late, but also valuable. I was able to use the above code to Average out a data set if another record appears X number of times.
=AVG(IIF(Count(Fields!AcctNo.Value, "AcctNo1") = 2, Fields!Limit.Value, Nothing))
So, if the acctno field appears 1 time, avg the limit field for that row group. Ian's example was very helpful
Hope your well.
I am working on a report and seem to get a #error. Seems like it is a divide by zero error but I can not work out a solution. The expression:
=( Sum(Fields!Line_Sell.Value) - Sum(Fields!Line_Cost.Value) ) / Sum(Fields!Line_Sell.Value)
I am relatively new to RS but have tried
ISNULL( )
but with no success.
Any help, I would be greatful.
Thanks
Let's say you have an expression set to x / y, where y has the potential to be zero. As you experienced, SSRS will change this value to #ERR (or sometimes NaN).
Your first instinct would be to test for zero
=Iif(y = 0, 0, x/y)
Unfortunately, this can result in a debugger warning that says you are attempting to divide by zero. This is because SSRS attempts to evaluate the entire statement during compilation.
As a result, we need to provide SSRS with a value that it can evaluate
=x * y ^ -1
This is the same as dividing by your y value, but SSRS sees this as dividing by infinity, and therefore can make an evaluation.
As a final step, you will want to make sure your code can properly export to Excel. Under 2012 SSRS (and possibly later, I haven't tested), SSRS has an issue where possible zero values export to Excel as 0.000000000000000 and cause loss of data errors.
To correct this, we explicitly output the value of zero
=Iif(x = 0 OR y = 0, 0, x * y ^ -1)
The expression in your comment doesn't look complete, so I can't tell what you tried next that didn't work. You definitely want to test for zero before performing division.
You can try this:
=iif( Sum(Fields!Line_Sell.Value) = 0, 0, (Sum(Fields!Line_Sell.Value) - Sum(Fields!Line_Cost.Value)) / Sum(Fields!Line_Sell.Value))
Or to check for an empty value also, you can try this:
=iif( (Sum(Fields!Line_Sell.Value) = 0 or IsNothing(Sum(Fields!Line_Sell.Value)), 0,Sum(Fields!Line_Sell.Value) - Sum(Fields!Line_Cost.Value)) / Sum(Fields!Line_Sell.Value))
If that's still not yielding results, break down the expression and run the report. Try Sum(Fields!Line_Sell.Value) by itself, run the report and see what you get. To be more efficient create a table with one column for Fields!Line_Sell.Value and another for Fields!Line_Cost.Value. In the table, include detail rows and add a total row so that you get the Sum function with each of those fields individually. You need to look at the detail records to try to extrapolate why the aggregate function isn't working. Bottom line - decompose your expression and test it piece by piece. The answer is in there somewhere.