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# Stats Aggregation
> More info about stats aggregation is in the [official elasticsearch docs][1]
A multi-value metrics aggregation that computes stats over numeric
values extracted from the aggregated documents.
## Simple example
```JSON
{
"aggregations" : {
"grades_stats" : { "stats" : { "field" : "grade" } }
}
}
```
And now the query via DSL:
```php
$statsAggregation = new StatsAggregation('grades_stats', 'grade');
$search = new Search();
$search->addAggregation($statsAggregation);
$queryArray = $search->toArray();
```
[1]: https://www.elastic.co/guide/en/elasticsearch/reference/current/search-aggregations-metrics-stats-aggregation.html
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