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Using aggregate sql (sum) in a jstl sql action  RSS feed

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This is a problem that I couldn't find addressed on the web, but which I eventually figured out. Here's the scenario. I was trying to do this:

But I would get this error message:

Property 'COST' not found on type java.lang.String

Of course I could find the sum in my jsp as follows:

But I'd rather have the DBMS do the summing for me. So I tried this:

This actually worked. However since I knew I was only going to get a single value back from the query, I also tried replacing the loop with this:

That worked like a charm. ${clientShipping} now held the sum returned by the sql query.
[ September 24, 2008: Message edited by: deb platt ]
Don't get me started about those stupid light bulbs.
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