聚合函数 1.搜索address中包含mill的所有人的年龄分布及平均年龄和平均薪资

GET /bank/_search
{
  "query": {
    "match": {
      "address": "mill"
    }
  },
  "aggs": {
    "ageDistributed": {    //取名字
      "terms": {
        "field": "age",
        "size": 10
      }
    },
    "aggAvg":{  //取名字
      "avg": {
        "field": "age"
      }
    },
    "balanceAvg":{   //取名字
      "avg": {
        "field": "balance"
      }
    }
  },
  "size": 0    //不看查出来的数据，只看聚合数据
  }

2.按年龄聚合，并且查出这些年龄段的平均薪资

GET /bank/_search
{
  "query": {
    "match_all": {}
  }, 
  "aggs": {
    "aggAgeFenBu": {
      "terms": {
        "field": "age",
        "size": 100
      },
      "aggs": {     //子聚合
        "balanceAvg": {
          "avg": {
            "field": "balance"
          }
        }
      }
    }
  }
}

3.查出总体年龄分布，并且这些年龄段中男生的平均薪资和女生的平均薪资。以及这个年龄段的总体平均薪资

GET /bank/_search
{
  "aggs": {
    "aggAgeFenBu": {
      "terms": {
        "field": "age",
        "size": 10
      },"aggs": {
        "genderAgg": {
          "terms": {
            "field": "gender.keyword",
            "size": 100
          },"aggs": {
            "balanceAvg": {
              "avg": {
                "field": "balance"
              }
            }
          }
        },
        "balanceAvg":{
          "avg": {
            "field": "balance"
          }
        }
      }
    }
  }
  
}

alt