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Sequence gap in alpha-numeric field

Posted on 2006-11-29
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Last Modified: 2010-08-05
I have a field with data formated : AB002200, AB002201, AB002203, AB002204, AB002206, etc. The first two characters are always AB followed by 6 numbers. I want a formula to find gaps in the numeric sequence portion of this data. (for example AB002205 is missing in my sample data) I have Crystal Reports 8.5
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Question by:toddcolson
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Expert Comment

by:mlmcc
ID: 18042128
Try this
Put the field in the detail section
Right Click the left margin of the detail section
Click FORMAT SECTION
Click the format button next to SUPPRESS
Formula is
   PreviousIsNull({YourField}) or (ToNumber(Right({YourField,6)) - 1 = (Previous(ToNumber(Right({YourField,6)))

mlmcc

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Author Comment

by:toddcolson
ID: 18042399
I get matching } for this field name is missing, if I add the brackets to the field name I get the ) is missing.
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Expert Comment

by:mlmcc
ID: 18042564
Sorry { } go around the Crystal field names.

Try this one
 PreviousIsNull({YourField}) or (ToNumber(Right({YourField},6)) - 1 = (Previous(ToNumber(Right({YourField},6)))))

mlmcc
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Author Comment

by:toddcolson
ID: 18042701
I get field is required here message after:    Previous(
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Expert Comment

by:mlmcc
ID: 18042792
That's what I get for copying.

PreviousIsNull({YourField}) or (ToNumber(Right({YourField},6)) - 1 = (ToNumber(Right(Previous({YourField},6)))))

mlmcc
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Author Comment

by:toddcolson
ID: 18042814
Now: To many arguments have been given to this function.
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Expert Comment

by:mlmcc
ID: 18042826
Sorry.

PreviousIsNull({YourField}) or (ToNumber(Right({YourField},6)) - 1 = (ToNumber(Right(Previous({YourField}),6))))

mlmcc
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Author Comment

by:toddcolson
ID: 18042890
Now: The string is non numeric
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Author Comment

by:toddcolson
ID: 18042923
Wait, It works!, Now I got it. Thanks
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Author Comment

by:toddcolson
ID: 18042965
It works, but I need a formula that creates a report that continues to show all of the data in the field and somehow marking the gaps. Is that possible?
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LVL 100

Expert Comment

by:mlmcc
ID: 18043118
Yes.  How do you want the gaps marked?

mlmcc
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Author Comment

by:toddcolson
ID: 18043176
Maybe like a formula field with the word missing at the gap. Or highlighting. Any report that keeps all the data in the field while at the same time showing the gaps.
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Expert Comment

by:mlmcc
ID: 18043328
Let me think about it.  Rather late here now.

mlmcc
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Accepted Solution

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mlmcc earned 500 total points
ID: 18228242
Do you still need assistance with this?

mlmcc
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