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+# Stats Aggregation
+
+> More info about stats bucket aggregation is in the [official elasticsearch docs][1]
+
+A sibling pipeline aggregation which calculates a variety of stats across all bucket of 
+a specified metric in a sibling aggregation. The specified metric must be numeric and the 
+sibling aggregation must be a multi-bucket aggregation.
+
+## Simple example
+
+```JSON
+{
+    "aggs" : {
+        "sales_per_month" : {
+            "date_histogram" : {
+                "field" : "date",
+                "interval" : "month"
+            },
+            "aggs": {
+                "sales": {
+                    "sum": {
+                        "field": "price"
+                    }
+                }
+            }
+        },
+        "stats_monthly_sales": {
+            "stats_bucket": {
+                "buckets_path": "sales_per_month>sales" 
+            }
+        }
+    }
+}
+```
+
+And now the query via DSL:
+
+```php
+$search = new Search();
+
+$dateAggregation = new DateHistogramAggregation('sales_per_month', 'date', 'month');
+$dateAggregation->addAggregation(
+    new SumAggregation('sales', 'price')
+);
+
+$search->addAggregation($dateAggregation);
+$search->addAggregation(
+    new StatsBucketAggregation('stats_monthly_sales', 'sales_per_month>sales')
+);
+
+$aggArray = $search->toArray();
+```
+
+[1]: https://www.elastic.co/guide/en/elasticsearch/reference/current/search-aggregations-pipeline-stats-bucket-aggregation.html
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