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Crystal Reports: database table lookup in formula

Posted on 2011-09-12
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Last Modified: 2012-05-12
I'm using Crystal Reports for VS 2010. In a CR formula I'd like to be able to lookup a database table. The function would be something like this:
   lookup(tablename, pk_col, result_col).

For example, lookup("States", "StateCode", "StateName") would look up a state code such as "AK" from table "States" and return "Alaska".

Is there any such thing?
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Question by:BlearyEye
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by:mlmcc
ID: 36526658
The full versions of Crystal have what os called a SQL Expression.

Check the field explorer to see if you have that.
If so create a new one.  It is just basically SQL but it can only return a single VALUE.

Something like

SELECT FullStatename FROM States WHERE StateCode = {StateCodeField}


mlmcc
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GJParker earned 2000 total points
ID: 36528916
This isn't practical in CR without using subreports which would have an impact on performance. Why can't you simply add the states table to the report and link on the statecode field.
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by:BlearyEye
ID: 36531024
The SELECT expression doesn't seem to work in the VS version. That's too bad, since it would be nice if it were available. But adding the extra tables did the trick.
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