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# Global Aggregation
> More info about cardinality aggregation is in the [official elasticsearch docs][1]
Defines a single bucket of all the documents within the search execution
context. This context is defined by the indices and the document types
you’re searching on, but is **not influenced** by the search query itself.
## Simple example
```JSON
{
"aggregations": {
"all_products": {
"global": {},
"aggregations": {
"avg_price": {
"avg": {
"field": "price"
}
}
}
}
}
}
```
And now the query via DSL:
```php
$avgAggregation = new AvgAggregation('avg_price', 'price');
$globalAggregation = new GlobalAggregation('all_products');
$globalAggregation->addAggregation($avgAggregation);
$search = new Search();
$search->addAggregation($globalAggregation);
$queryArray = $search->toArray();
```
[1]: https://www.elastic.co/guide/en/elasticsearch/reference/current/search-aggregations-bucket-global-aggregation.html
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