Nested Aggregations

• Example of nested aggregation query, terms and histogram:

  curl -XPOST 'localhost:9200/ordering/order/_search?pretty=true' -d '
  {
  "size": 0,
  "aggs": {
    "order-status": {
      "terms": {
      "field": "status"
      },
      "aggs": {
        "placedOnMonth": {
            "date_histogram" : {
              "field": "placedOn",
              "interval": "month",
              "format": "YYYY-MM"
             }
        }
      }
    }
  }
  }
  '