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04.04.2007 at 11:18AM PDT, ID: 22492542
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9.2

Average where text exists in a field.

Asked by graysoc in Microsoft Access Database

Tags: , , ,

I need to average the grades for a field.  The options are 1, 2, 3, 4, or N/O (Not observed).  The problem is when I attempt to just average the field, I get a data type mismatch due to the text (N/O).  How can I average the field where the field is numeric, and ignore the textual rows?  I do not want to convert the text to 0, because that will lower the average.  Null won't work because the system cannot average a null either.

Essentially, I want a subquery that will produce this average for each column:

Select avg(select [field] from [table] where [field] isnumeric) from [table]

Something like that, but I know isnumeric will not work.

Thanks.

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[+][-]04.04.2007 at 11:21AM PDT, ID: 18852558

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[+][-]04.04.2007 at 11:21AM PDT, ID: 18852563

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[+][-]04.04.2007 at 11:22AM PDT, ID: 18852576

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About this solution

Zone: Microsoft Access Database
Tags: average, exists, mismatch, text
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Solution Provided By: capricorn1
Participating Experts: 3
Solution Grade: A
 
 
[+][-]04.04.2007 at 11:24AM PDT, ID: 18852589

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[+][-]04.04.2007 at 11:25AM PDT, ID: 18852598

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