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Display the current value or if it is null then previous value

Posted on 2009-03-31
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Last Modified: 2012-05-06
If the field value is not null show me the value but if it is null then show me the previous value.
The way it works ,the report is built on Crystal Console and then put on Crystal RAS server where it is taken by third party application, which has the provision of drop down or selection list where the user can pick any one value or leave it blank.
So the client wants show me the value if the user selects  a value.
But if the user does not select any value and leave it blank show me the previous value and if that field  has never filled and left blank for show me an error message "No Data".
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Question by:bodeveloper17
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8 Comments
 
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Expert Comment

by:mlmcc
ID: 24035179
WHere is the user selecting values?

Is this in the parameter prompting screen?

Is this a database field?

Does the report pull all data or is there filtering?

mlmcc
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Author Comment

by:bodeveloper17
ID: 24038753
User is selecting the value in a third party application. But the data gets updated in Database.
This is not a parameter.It is a field value
Yes this is a database field.
Right now the report is pulling the value if it is there for that PR.ID, if there is no value then display "No Data"
But the record will have only one value at a time.It can be left blank also.
So show me data if there is value, if there it is empty then show me the previous filled value.
If the record is new, user has not filled any value show me "No data"
Report is grouped by PR.ID and has a selection criteria based on Process Name.
Let me know if you need more info.Thanks for you help.
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LVL 100

Expert Comment

by:mlmcc
ID: 24040738
How can you tell the difference between a new record and one that has had data?

Is that value saved somewhere?

mlmcc
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Author Comment

by:bodeveloper17
ID: 24040921
Yes it is saved in another table.
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Expert Comment

by:mlmcc
ID: 24041026
Is that table included in the report?

mlmcc
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Author Comment

by:bodeveloper17
ID: 24041189
Yes i have included that table.
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LVL 100

Accepted Solution

by:
mlmcc earned 500 total points
ID: 24041507
Something like

If IsNull({TheField}) then
    If IsNull({ThePreviousField}) then
        "No Data"
    else
         {ThePreviousField}
else
   {TheField}

mlmcc
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Author Closing Comment

by:bodeveloper17
ID: 31565059
Thanks a lot mlmcc.I changed the formula and it worked.
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