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POHow to select specific field and make total sum for that field with JDO
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2011-09-06T19:49:10.580
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2011-09-06T19:55:13.223
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I want to make just a simple function that sums all with same name. I have mapped JDO like this: <pre><code>costName Cost food 10 food 10 water 5 food 10 total of food 30 total of water 5 </code></pre> With this code I get total sum of all (this case 35) <pre><code>int totalsum=0; int sumCap=0; for (JDO total : table) { totalsum += total.getCost() ; } </code></pre> How do I get the cost for only food or/and water? Should be simple but I don't get it.
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<java><google-app-engine><jdo>
Title
How to select specific field and make total sum for that field with JDO
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1. PO
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1. USMat
UserOwnerUserId
1. USAndrea Scotto
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1. COWhile certain JDO implementations support 'group by', GAE does not (AFAIK). See the conversation thread http://groups.google.com/group/google-appengine-java/browse_thread/thread/48bef85e84c3f15a
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 POHow to select specific field and make total sum for that field with JDO
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 USDilum Ranatunga

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