71_数据建模实战_对每个国家的员工兴趣爱好进行聚合统计

71_数据建模实战_对每个国家的员工兴趣爱好进行聚合统计

统计每个国家的喜欢每种爱好的员工有多少个

GET /company/rd_center/_search 
{
  "size": 0,
  "aggs": {
    "group_by_country": {
      "terms": {
        "field": "country.keyword"
      },
      "aggs": {
        "group_by_child_employee": {
          "children": {
            "type": "employee"
          },
          "aggs": {
            "group_by_hobby": {
              "terms": {
                "field": "hobby.keyword"
              }
            }
          }
        }
      }
    }
  }
}

搜索结果

{
  "took": 15,
  "timed_out": false,
  "_shards": {
    "total": 5,
    "successful": 5,
    "failed": 0
  },
  "hits": {
    "total": 3,
    "max_score": 0,
    "hits": []
  },
  "aggregations": {
    "group_by_country": {
      "doc_count_error_upper_bound": 0,
      "sum_other_doc_count": 0,
      "buckets": [
        {
          "key": "中国",
          "doc_count": 2,
          "group_by_child_employee": {
            "doc_count": 3,
            "group_by_hobby": {
              "doc_count_error_upper_bound": 0,
              "sum_other_doc_count": 0,
              "buckets": [
                {
                  "key": "爬山",
                  "doc_count": 2
                },
                {
                  "key": "游泳",
                  "doc_count": 1
                }
              ]
            }
          }
        },
        {
          "key": "美国",
          "doc_count": 1,
          "group_by_child_employee": {
            "doc_count": 1,
            "group_by_hobby": {
              "doc_count_error_upper_bound": 0,
              "sum_other_doc_count": 0,
              "buckets": [
                {
                  "key": "骑马",
                  "doc_count": 1
                }
              ]
            }
          }
        }
      ]
    }
  }
}