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Crystal Reports - How do I calculate the difference between two summary fields in a group footer

hymie42
hymie42 asked
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Last Modified: 2012-05-07
Hi,

What should be incredibly simple has taken me hours, and still no closer.  I have two numeric summary fields in a crystal report, and i need a third field to show the difference (subtract) between them.

Have tried to figure out the formula, but when I use the field names with a "@" in front of them I get "Field is not known".

As these are summary fields in a footer section i cannot (for other reasons also) use the table values for this.

I know this must be simple - please help,

Dave
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Commented:
You would have to subtract the Summary fields from each other in a formula
ie.

Sum({Fieldname}) - Sum({2ndFieldname})

Craig.

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Commented:
Summary fields would show with a sigma prefix in the report fields and show like..
<sigma>Group#1:Customers.Country-A:Sum of Customers.LastYearsSales

To take one from another is no different to using any other fields , double click (do NOT type) the first one, type a minus sign and doubleclick the second.

Author

Commented:
Hi and Thanks for the fast response.  I am glad to say i already tried this and it doesnt work, mainly because of the structure of the table I expect.

This is why i need to use the values shown and not the formulas, if that makes sense.

if i do this by using the formulas I get totals for the whole table rather than just the section - i am expecting values around 40-50 and get 50000 upwards instead.

is there not a way to directly access the value of the summary field?

Dave

Commented:
can you post the formula you are using to calculate.
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Commented:
"As these are summary fields in a footer section"
If the summaries are standard Crystal summaries there is no reason at all why you can't take one from another.

If they are not standard crystal summaries then we are all in the dark here aren't we.

Author

Commented:
Hi again,

i have attached a pic showing (hopefully) what I am trying to do.  i need to subtract (2) from (1) using the field values and place the result in the field to the right of (2).

Field names are (1) HoursBooked1 and (2) TimeSheethours and the result should go in field HourDiff1.

Hopefully this makes sense.

Have also attached the formula workshop view so you can see what the options are and maybe make suggestions from there.

I have used access extensively along with some other development tools, but must say I am finding Crystal very frustrating...

Regards,

Dave
ee.gif
ee1.gif

Commented:
in the formula editor for time difference,, double click on the first Report Area (at the bottom of the  screenshot) then type '-' then double click on the 2nd Report Area (at the bottom of the screen shot)

Author

Commented:
Tried that - it hightlights everything to the right of the Minus sign and says "The remaining text does not appear to be part of the formula".


ee2.gif

Commented:
can you post your report with saved data?

Author

Commented:
I would have to create a table, as the report gets its data from an access query in our clocking system, but as the report gets its data from the dataset associated with the form that the report is viewed on ,  it would be a bit messy to try do it that way. (its on a vb.net system)

Really frustrated on this as i have spent nearly the whole day - really apprecite your help:)

Any other way we can do this that you can think of?

Commented:
You can save the report with saved data in Crystal 10.. even if you can just post the RPT file it might help.

Author

Commented:
I can post just the .rpt file if that will help.....

And some data in a csv or spreadsheet?

Commented:
no just the rpt will be fine.. there is an option in Crystal when saving the Report to "Save Report with Data".

Author

Commented:
Bah - tried to post it - says "The extension of one or more files in the archive is not in the list of allowed extensions: rptHoursAttendedVsHoursBooked.rpt"

Could email it?

Author

Commented:
OK - changed extension to .txt - you will need to change it back again
rptHoursAttendedVsHoursBooked.txt
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Commented:
Can't see a problem.
Updated file attached.
rptHoursAttendedVsHoursBooked.txt

Commented:
I think you are suming some of the values in the qry then summing them again.. its a bit confusing.. Can you not just use the query to return the values to the dataset in an un-summed form first. it might help.

Author

Commented:
Hi Peter,

Thanks for that - still gives the incorrect figures though - 168-110 does not give -2617, which is the problem.

Its is because I am joining several queries together for the data and using the underlying summary formulae takes all the data rather than just the value of the text field.

See attached hopefully this will clarify further.

Thanks for input - really appreciate having people to talk to when stuck like this:)
ee3.gif

Author

Commented:
Hi cjonline,

There are multiple segments / groups, so returning anything unsummed to the dataset on the underlying form....not sure how that would work..

Regards,

Dave

Author

Commented:
Hi mlmcc,

If you follow the thread above you will see that in the Crystal Reports section you DONT ALLOW us to upload an rpt file without much gymnastics, hence the email address - it wast a help by email, rather just a means to send a file for examination.

Maybe with this being the Crystal Reports section you could allow the transfer of Crystal files?

Regards,

Dave
Commented:
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