Hi, there's a bug when you try to show the percentage summary using decimals in a crosstab, it shows the decimal fiels with a zero value. The bug is reported in the document I post here. They also propose a solution for it. But this solution doesn't work (or I can't make it work) when the rows and columns of the cross tab are defined using Specific Order (in this case the groups are defined by the user) and the solution they suggest here doesn't work.
How can I do to fix this decimals problem? because I need to show decimals in the Percentage field.
10/4/2002 3:24 PM
Copyright 2002 Crystal Decisions, Inc. All Rights Reserved. Page 1
Crystal Reports
Displaying PercentOfCount and/or PercentOfDistinctCount
summaries in a cross-tab
Overview
In a Crystal Reports (CR) 9 cross-tab, the summary options,
PercentOfDistinctCount
and PercentOfCount, do not display data correctly.
Any numbers after the decimal point are rounded down to zero.
This document will explain why this decimal precision issue occurs and will
provide workarounds to display the data correctly.
Contents
I
NTRODUCTION............................................................................................2
W
HY DO INCORRECT VALUES APPEAR?........................................................2
D
ISPLAYING PERCENTOFCOUNT/PERCENTOFDISTINCTCOUNT SUMMARIES..2
PercentOfDistinctCount Summaries ............................................................3
Set up the report................................................................................................. 3
Create a formula ................................................................................................ 4
Create a Cross-tab.............................................................................................. 4
PercentOfCount Summaries.........................................................................4
Create a formula ................................................................................................ 5
Create a Cross-tab.............................................................................................. 5
C
ONTACTING CRYSTAL DECISIONS FOR TECHNICAL SUPPORT......................5
Crystal Reports 9
10/4/2002 3:24 PM
Copyright 2002 Crystal Decisions, Inc. All Rights Reserved. Page 2
Introduction
In CR 9, there is a limitation with displaying
PercentOfCount or
PercentOfDistinctCount
summary values in a cross-tab. The decimal portion
of the number is rounded down to zero and therefore displays what appears to be
an incorrect value.
This document will:
•
explain the reason for this issue.
•
provide a workaround to display a PercentOfDistinctCount in a crosstab
with correct decimal precision.
•
provide a workaround to display a PercentOfCount in a cross-tab with
correct decimal precision.
Why do incorrect values appear?
This is a known issue and has been assigned track ID ADAPT00104013.
Inserting a field into the
Summarized Fields box of a cross-tab, and choosing to
display as a
PercentOfCount summary or PercentOfDistinctCount summary
will display the values without decimal precision. For example, if the value
should be displayed as 35.64%, the cross-tab will display the value as 35.00%.
This issue has been addressed in a hot fix. The solution to fix this problem is to
display zero decimal places. For example, if the value should be displayed as
35.64%, the value will instead be displayed with no decimals as 35%.
Why does this solution not address the underlying problem? The reason the
exact decimal precision is not fixed is because CR stores
PercentOfCount and
PercentOfDistinctCount
summaries as integers. To display the decimal
portions of the value, the data-type would need to be changed from an integer to
a floating point. If such an architectural change were made to CR and released
as a product update, reports created and saved using a build of CR with this
update applied could become corrupted if opened using a build of CR without
the update applied. This would render these reports unusable and corrupted
reports would need to be recreated. Therefore, it was decided not to fix the
underlying issue but to round the numbers with zero decimal places instead.
There are workarounds to display the exact decimal precision in a cross-tab.
Displaying PercentOfCount/PercentOfDistinctCount
Summaries
Both of the following examples:
Crystal Reports 9
10/4/2002 3:24 PM
Copyright 2002 Crystal Decisions, Inc. All Rights Reserved. Page 3
•
use the Access sample database, Xtreme.mdb, which is installed with
Crystal Reports.
•
are based on the Customer table.
•
have the Customer.Country field filtered to show only Australia.
PercentOfDistinctCount Summaries
To correctly display a
PercentOfDistinctCount summary, summarize a formula
field that displays the
PercentOfDistinctCount rather than summarizing a
database field in the cross-tab
To make this formula, the report needs to be grouped on the same fields as the
cross-tab’s row and column fields.
Note:
If it is not possible to modify the grouping of the main report, the cross-tab can be displayed in a subreport, which is set
up with the appropriate grouping and is only used to display the cross-tab.
However, cross-tabs in subreports do not display virtual pages. If the cross-tab grows larger than the width of the page,
data to the right of the page width will not be displayed. There is no workaround for this issue.
For more information on Subreports refer to CR’s White Paper; scr_subreports.pdf at:
http://support.crystaldecisions.com/docs
Set up the report
The report must be grouped on the same fields used in the cross-tab. For
example, if the cross-tab needs to display the
PercentOfDistinctCount of the
Customer ID field with a Country row and Region column, perform the
following steps:
1.
The first group is based on the cross-tab’s ‘row’ field. On the Insert menu,
click
Group. From the top drop-down box select Customer.Country. Click
OK
.
2.
The second group is based on the cross-tab’s ‘column’ field. On the Insert
menu, click
Group. From the top drop-down box select Customer.Region.
Click
OK.
3.
Insert the field that requires the PercentOfDistinctCount summary to your
details section. On the
View menu click Field Explorer. Expand
Database Fields
then expand Customer. Add the Customer.Customer ID
field to the
Details section.
4.
Right-click the Customer.Customer ID field and click Insert > Summary.
From the
Calculate this summary drop-down box click Distinct count.
From the
Summary location drop-down box click Group #2:
Customer.Region
. Select the Show as a percentage of check box and
click
Group #1: DistinctCount of Customer ID.
Crystal Reports 9
10/4/2002 3:24 PM
Copyright 2002 Crystal Decisions, Inc. All Rights Reserved. Page 4
Create a formula
The next step is to create a formula, which displays the
PercentOfDistinctCount
.
1.
Create a formula and name it Distinct_Count.
2.
From the Report Fields box double-click the Summary field created in the
previous steps. The formula will appear as:
PercentOfDistinctCount ({Customer.Customer ID}, {Customer.Region}, {Customer.Country})
3.
Click the Save button then click the Close button.
Create a Cross-tab
The final step is to create a cross-tab to use the formula created in the previous
steps as the summarized field.
1.
On the Insert menu click Cross-Tab. The Cross-tab Expert dialog box
will appear.
2.
From the Available Fields box move Customer.Country to the Rows box.
3.
From the Available Fields box move Customer.Region to the Columns
box.
4.
From the Available Fields box move the @Distinct_Count formula, created
in the previous steps, to the Summarized Fields box.
5.
Click the @Distinct_Count formula in the Summarized Fields box then
click the
Change Summary button. From the Calculate this summary
drop-down box click
Maximum.
6.
Click the OK button to close the Cross-Tab Expert dialog box then insert
the cross-tab in the
Report Header section.
7.
Suppress every other section in the report.
Now when the report is previewed, the
PercentOfDistinctCount summary in
the cross-tab will appear with correct decimal accuracy.
PercentOfCount Summaries
To correctly display a
PercentOfCount summary, summarize a formula field
that displays a value of 1 in the cross-tab instead of summarizing a database
field. When this formula is summed it will display the same total as a count of
the field would return. Unlike a
PercentOfCount summary, a PercentOfSum
summary will display correct decimal precision.
Unlike the previous example, the report
does not need to be set up with the
same grouping as the cross-tab in order
to display the correct value.
Crystal Reports 9
10/4/2002 3:24 PM
Copyright 2002 Crystal Decisions, Inc. All Rights Reserved. Page 5
Create a formula
The first step is to create a formula, which outputs a value of 1.
1.
Create a formula and name it Count. Enter the following:
WhileReadingRecords;
1
2.
Click the Save button then click the Close button.
Create a Cross-tab
The final step is to create a cross-tab that uses the formula created in the
previous steps as the summarized field.
1.
On the Insert menu click Cross-Tab. The Cross-tab Expert will appear.
2.
From the Available Fields box move Customer.Country to the Rows box.
3.
From the Available Fields box move Customer.Region to the Columns
box.
4.
Add the @Count formula created in the previous steps to the Summarized
fields
box.
5.
Click the @Count formula in the Summarized Fields box then click the
Change Summary
button. The Edit Summary dialog box will appear.
6.
From the Calculate this summary drop-down box click Sum.
7.
Check the Show as a percentage of check box and, from the drop-down
box click
Total: Sum of Customer ID.
8.
Select the Column radio button.
9.
Click the OK button to close the Edit Summary dialog box then click the
OK
button to close the Cross-Tab Expert dialog box.
10.
Insert the cross-tab in the Report Header section.
Now, when the report is previewed the
PercentOfCount summary in the crosstab
will appear with correct decimal accuracy.
Contacting Crystal Decisions for Technical Support
We recommend that you refer to the product documentation and that you visit
our Technical Support web site for more resources.
Self-serve Support:
http://support.crystaldecisions.com/
Crystal Reports 9
10/4/2002 3:24 PM
Copyright 2002 Crystal Decisions, Inc. All Rights Reserved. Page 6
Email Support:
http://support.crystaldecisions.com/support/answers.asp
Telephone Support:
http://www.crystaldecisions.com/contact/support.asp
IP Logged