python 使用 elasticsearch 經常使用方法（聚合）

#記錄聚合查詢方法

from elasticsearch import Elasticsearch

es = Elasticsearch(['xx.xx.xx.xx:9200'])


#獲取最小的年齡
res = es.search(index='test6', body = {
    "query": {
        "match_all": {}
    },
    "aggs": {
        "min_age": {
            "min": {
                "field": "age"
            }
        }
    }
})
print(res['aggregations']['min_age']['value'])


#獲取最大的年齡
res = es.search(index='test6', body = {
    "query": {
        "match_all": {}
    },
    "aggs": {
        "max_age": {
            "max": {
                "field": "age"
            }
        }
    }
})
print(res['aggregations']['max_age']['value'])


#獲取年齡和
res = es.search(index='test6', body = {
    "query": {
        "match_all": {}
    },
    "aggs": {
        "sum_age": {
            "sum": {
                "field": "age"
            }
        }
    }
})
print(res['aggregations']['sum_age']['value'])


#獲取平均年齡
res = es.search(index='test6', body = {
    "query": {
        "match_all": {}
    },
    "aggs": {
        "avg_age": {
            "avg": {
                "field": "age"
            }
        }
    }
})
print(res['aggregations']['avg_age']['value'])

# from、size
#from：從「第幾條」開始查詢, size：查詢多少條res = es.search(index='test6', body = {    "query": {        "match_all": {}    },    "size": 1,    "from": 2})print(res)