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# Sum Aggregation > More info about sum aggregation is in the [official elasticsearch docs][1] A single-value metrics aggregation that sums up numeric values that are extracted from the aggregated documents. ## Simple example ```JSON { "aggregations" : { "intraday_return" : { "sum" : { "field" : "change" } } } } ``` And now the query via DSL: ```php $sumAggregation = new SumAggregation('intraday_return', 'change'); $search = new Search(); $search->addAggregation($sumAggregation); $queryArray = $search->toArray(); ``` [1]: https://www.elastic.co/guide/en/elasticsearch/reference/current/search-aggregations-metrics-sum-aggregation.html
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