【Docker+springboot】集成部署ES+Kibana+IK(中)

简介: 【Docker+springboot】集成部署ES+Kibana+IK(中)
  • 字符串,全文检索
GET bank/_search
{
  "query": {
    "match": {
      "address": "kings"
    }
  }
}

全文检索,最终会按照评分进行排序,会对检索条件进行分词匹配。

查询结果:

{
  "took" : 30,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 2,
      "relation" : "eq"
    },
    "max_score" : 5.990829,
    "hits" : [
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "20",
        "_score" : 5.990829,
        "_source" : {
          "account_number" : 20,
          "balance" : 16418,
          "firstname" : "Elinor",
          "lastname" : "Ratliff",
          "age" : 36,
          "gender" : "M",
          "address" : "282 Kings Place",
          "employer" : "Scentric",
          "email" : "elinorratliff@scentric.com",
          "city" : "Ribera",
          "state" : "WA"
        }
      },
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "722",
        "_score" : 5.990829,
        "_source" : {
          "account_number" : 722,
          "balance" : 27256,
          "firstname" : "Roberts",
          "lastname" : "Beasley",
          "age" : 34,
          "gender" : "F",
          "address" : "305 Kings Hwy",
          "employer" : "Quintity",
          "email" : "robertsbeasley@quintity.com",
          "city" : "Hayden",
          "state" : "PA"
        }
      }
    ]
  }
}
(4) match_phrase [短句匹配]


将需要匹配的值当成一整个单词(不分词)进行检索

GET bank/_search
{
  "query": {
    "match_phrase": {
      "address": "mill road"
    }
  }
}

查处address中包含mill_road的所有记录,并给出相关性得分

查看结果:

{
  "took" : 32,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 1,
      "relation" : "eq"
    },
    "max_score" : 8.926605,
    "hits" : [
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "970",
        "_score" : 8.926605,
        "_source" : {
          "account_number" : 970,
          "balance" : 19648,
          "firstname" : "Forbes",
          "lastname" : "Wallace",
          "age" : 28,
          "gender" : "M",
          "address" : "990 Mill Road",
          "employer" : "Pheast",
          "email" : "forbeswallace@pheast.com",
          "city" : "Lopezo",
          "state" : "AK"
        }
      }
    ]
  }
}

match_phrase和Match的区别,观察如下实例:

GET bank/_search
{
  "query": {
    "match_phrase": {
      "address": "990 Mill"
    }
  }
}


查询结果

{
  "took" : 0,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 1,
      "relation" : "eq"
    },
    "max_score" : 10.806405,
    "hits" : [
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "970",
        "_score" : 10.806405,
        "_source" : {
          "account_number" : 970,
          "balance" : 19648,
          "firstname" : "Forbes",
          "lastname" : "Wallace",
          "age" : 28,
          "gender" : "M",
          "address" : "990 Mill Road",
          "employer" : "Pheast",
          "email" : "forbeswallace@pheast.com",
          "city" : "Lopezo",
          "state" : "AK"
        }
      }
    ]
  }
}


使用match的keyword


GET bank/_search
{
  "query": {
    "match": {
      "address.keyword": "990 Mill"
    }
  }
}


查询结果,一条也未匹配到


{
  "took" : 0,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 0,
      "relation" : "eq"
    },
    "max_score" : null,
    "hits" : [ ]
  }
}


修改匹配条件为“990 Mill Road”


GET bank/_search
{
  "query": {
    "match": {
      "address.keyword": "990 Mill Road"
    }
  }
}


查询出一条数据


{
  "took" : 1,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 1,
      "relation" : "eq"
    },
    "max_score" : 6.5032897,
    "hits" : [
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "970",
        "_score" : 6.5032897,
        "_source" : {
          "account_number" : 970,
          "balance" : 19648,
          "firstname" : "Forbes",
          "lastname" : "Wallace",
          "age" : 28,
          "gender" : "M",
          "address" : "990 Mill Road",
          "employer" : "Pheast",
          "email" : "forbeswallace@pheast.com",
          "city" : "Lopezo",
          "state" : "AK"
        }
      }
    ]
  }
}

文本字段的匹配,使用keyword,匹配的条件就是要显示字段的全部值,要进行精确匹配的。

match_phrase是做短语匹配,只要文本中包含匹配条件,就能匹配到。


(5)multi_math【多字段匹配】
GET bank/_search
{
  "query": {
    "multi_match": {
      "query": "mill",
      "fields": [
        "state",
        "address"
      ]
    }
  }
}

state或者address中包含mill,并且在查询过程中,会对于查询条件进行分词。

查询结果:

{
  "took" : 28,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 4,
      "relation" : "eq"
    },
    "max_score" : 5.4032025,
    "hits" : [
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "970",
        "_score" : 5.4032025,
        "_source" : {
          "account_number" : 970,
          "balance" : 19648,
          "firstname" : "Forbes",
          "lastname" : "Wallace",
          "age" : 28,
          "gender" : "M",
          "address" : "990 Mill Road",
          "employer" : "Pheast",
          "email" : "forbeswallace@pheast.com",
          "city" : "Lopezo",
          "state" : "AK"
        }
      },
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "136",
        "_score" : 5.4032025,
        "_source" : {
          "account_number" : 136,
          "balance" : 45801,
          "firstname" : "Winnie",
          "lastname" : "Holland",
          "age" : 38,
          "gender" : "M",
          "address" : "198 Mill Lane",
          "employer" : "Neteria",
          "email" : "winnieholland@neteria.com",
          "city" : "Urie",
          "state" : "IL"
        }
      },
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "345",
        "_score" : 5.4032025,
        "_source" : {
          "account_number" : 345,
          "balance" : 9812,
          "firstname" : "Parker",
          "lastname" : "Hines",
          "age" : 38,
          "gender" : "M",
          "address" : "715 Mill Avenue",
          "employer" : "Baluba",
          "email" : "parkerhines@baluba.com",
          "city" : "Blackgum",
          "state" : "KY"
        }
      },
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "472",
        "_score" : 5.4032025,
        "_source" : {
          "account_number" : 472,
          "balance" : 25571,
          "firstname" : "Lee",
          "lastname" : "Long",
          "age" : 32,
          "gender" : "F",
          "address" : "288 Mill Street",
          "employer" : "Comverges",
          "email" : "leelong@comverges.com",
          "city" : "Movico",
          "state" : "MT"
        }
      }
    ]
  }
}
(6)bool用来做复合查询


复合语句可以合并,任何其他查询语句,包括符合语句。这也就意味着,复合语句之间

可以互相嵌套,可以表达非常复杂的逻辑。


must:必须达到must所列举的所有条件


GET bank/_search
{
   "query":{
        "bool":{
             "must":[
              {"match":{"address":"mill"}},
              {"match":{"gender":"M"}}
             ]
         }
    }
}


must_not,必须不匹配must_not所列举的所有条件。

should,应该满足should所列举的条件。

实例:查询gender=m,并且address=mill的数据

GET bank/_search
{
  "query": {
    "bool": {
      "must": [
        {
          "match": {
            "gender": "M"
          }
        },
        {
          "match": {
            "address": "mill"
          }
        }
      ]
    }
  }
}

查询结果:


{
  "took" : 1,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 3,
      "relation" : "eq"
    },
    "max_score" : 6.0824604,
    "hits" : [
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "970",
        "_score" : 6.0824604,
        "_source" : {
          "account_number" : 970,
          "balance" : 19648,
          "firstname" : "Forbes",
          "lastname" : "Wallace",
          "age" : 28,
          "gender" : "M",
          "address" : "990 Mill Road",
          "employer" : "Pheast",
          "email" : "forbeswallace@pheast.com",
          "city" : "Lopezo",
          "state" : "AK"
        }
      },
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "136",
        "_score" : 6.0824604,
        "_source" : {
          "account_number" : 136,
          "balance" : 45801,
          "firstname" : "Winnie",
          "lastname" : "Holland",
          "age" : 38,
          "gender" : "M",
          "address" : "198 Mill Lane",
          "employer" : "Neteria",
          "email" : "winnieholland@neteria.com",
          "city" : "Urie",
          "state" : "IL"
        }
      },
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "345",
        "_score" : 6.0824604,
        "_source" : {
          "account_number" : 345,
          "balance" : 9812,
          "firstname" : "Parker",
          "lastname" : "Hines",
          "age" : 38,
          "gender" : "M",
          "address" : "715 Mill Avenue",
          "employer" : "Baluba",
          "email" : "parkerhines@baluba.com",
          "city" : "Blackgum",
          "state" : "KY"
        }
      }
    ]
  }
}


must_not:必须不是指定的情况

实例:查询gender=m,并且address=mill的数据,但是age不等于38的


GET bank/_search
{
  "query": {
    "bool": {
      "must": [
        {
          "match": {
            "gender": "M"
          }
        },
        {
          "match": {
            "address": "mill"
          }
        }
      ],
      "must_not": [
        {
          "match": {
            "age": "38"
          }
        }
      ]
    }
  }


查询结果:

{
  "took" : 4,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 1,
      "relation" : "eq"
    },
    "max_score" : 6.0824604,
    "hits" : [
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "970",
        "_score" : 6.0824604,
        "_source" : {
          "account_number" : 970,
          "balance" : 19648,
          "firstname" : "Forbes",
          "lastname" : "Wallace",
          "age" : 28,
          "gender" : "M",
          "address" : "990 Mill Road",
          "employer" : "Pheast",
          "email" : "forbeswallace@pheast.com",
          "city" : "Lopezo",
          "state" : "AK"
        }
      }
    ]
  }
}

should:应该达到should列举的条件,如果到达会增加相关文档的评分,并不会改变查询的结果。如果query中只有should且只有一种匹配规则,那么should的条件就会被作为默认匹配条件二区改变查询结果。


实例:匹配lastName应该等于Wallace的数据


GET bank/_search
{
  "query": {
    "bool": {
      "must": [
        {
          "match": {
            "gender": "M"
          }
        },
        {
          "match": {
            "address": "mill"
          }
        }
      ],
      "must_not": [
        {
          "match": {
            "age": "18"
          }
        }
      ],
      "should": [
        {
          "match": {
            "lastname": "Wallace"
          }
        }
      ]
    }
  }
}

查询结果:

{
  "took" : 5,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 3,
      "relation" : "eq"
    },
    "max_score" : 12.585751,
    "hits" : [
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "970",
        "_score" : 12.585751,
        "_source" : {
          "account_number" : 970,
          "balance" : 19648,
          "firstname" : "Forbes",
          "lastname" : "Wallace",
          "age" : 28,
          "gender" : "M",
          "address" : "990 Mill Road",
          "employer" : "Pheast",
          "email" : "forbeswallace@pheast.com",
          "city" : "Lopezo",
          "state" : "AK"
        }
      },
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "136",
        "_score" : 6.0824604,
        "_source" : {
          "account_number" : 136,
          "balance" : 45801,
          "firstname" : "Winnie",
          "lastname" : "Holland",
          "age" : 38,
          "gender" : "M",
          "address" : "198 Mill Lane",
          "employer" : "Neteria",
          "email" : "winnieholland@neteria.com",
          "city" : "Urie",
          "state" : "IL"
        }
      },
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "345",
        "_score" : 6.0824604,
        "_source" : {
          "account_number" : 345,
          "balance" : 9812,
          "firstname" : "Parker",
          "lastname" : "Hines",
          "age" : 38,
          "gender" : "M",
          "address" : "715 Mill Avenue",
          "employer" : "Baluba",
          "email" : "parkerhines@baluba.com",
          "city" : "Blackgum",
          "state" : "KY"
        }
      }
    ]
  }
}

能够看到相关度越高,得分也越高。


(7)Filter【结果过滤】


并不是所有的查询都需要产生分数,特别是哪些仅用于filtering过滤的文档。为了不计算分数,elasticsearch会自动检查场景并且优化查询的执行。


GET bank/_search
{
  "query": {
    "bool": {
      "must": [
        {
          "match": {
            "address": "mill"
          }
        }
      ],
      "filter": {
        "range": {
          "balance": {
            "gte": "10000",
            "lte": "20000"
          }
        }
      }
    }
  }
}

这里先是查询所有匹配address=mill的文档,然后再根据10000<=balance<=20000进行过滤查询结果


查询结果:

{
  "took" : 2,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 1,
      "relation" : "eq"
    },
    "max_score" : 5.4032025,
    "hits" : [
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "970",
        "_score" : 5.4032025,
        "_source" : {
          "account_number" : 970,
          "balance" : 19648,
          "firstname" : "Forbes",
          "lastname" : "Wallace",
          "age" : 28,
          "gender" : "M",
          "address" : "990 Mill Road",
          "employer" : "Pheast",
          "email" : "forbeswallace@pheast.com",
          "city" : "Lopezo",
          "state" : "AK"
        }
      }
    ]
  }
}

Each must, should, and must_not element in a Boolean query is referred to as a query clause. How well a document meets the criteria in each must or should clause contributes to the document’s relevance score. The higher the score, the better the document matches your search criteria. By default, Elasticsearch returns documents ranked by these relevance scores.


在boolean查询中,must, should 和must_not 元素都被称为查询子句 。 文档是否符合每个“must”或“should”子句中的标准,决定了文档的“相关性得分”。 得分越高,文档越符合您的搜索条件。 默认情况下,Elasticsearch返回根据这些相关性得分排序的文档。


The criteria in a must_not clause is treated as a filter. It affects whether or not the document is included in the results, but does not contribute to how documents are scored. You can also explicitly specify arbitrary filters to include or exclude documents based on structured data.


“must_not”子句中的条件被视为“过滤器”。 它影响文档是否包含在结果中, 但不影响文档的评分方式。 还可以显式地指定任意过滤器来包含或排除基于结构化数据的文档。


filter在使用过程中,并不会计算相关性得分:

GET bank/_search
{
  "query": {
    "bool": {
      "must": [
        {
          "match": {
            "address": "mill"
          }
        }
      ],
      "filter": {
        "range": {
          "balance": {
            "gte": "10000",
            "lte": "20000"
          }
        }
      }
    }
  }
}

查询结果:

{
  "took" : 1,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 213,
      "relation" : "eq"
    },
    "max_score" : 0.0,
    "hits" : [
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "20",
        "_score" : 0.0,
        "_source" : {
          "account_number" : 20,
          "balance" : 16418,
          "firstname" : "Elinor",
          "lastname" : "Ratliff",
          "age" : 36,
          "gender" : "M",
          "address" : "282 Kings Place",
          "employer" : "Scentric",
          "email" : "elinorratliff@scentric.com",
          "city" : "Ribera",
          "state" : "WA"
        }
      },
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "37",
        "_score" : 0.0,
        "_source" : {
          "account_number" : 37,
          "balance" : 18612,
          "firstname" : "Mcgee",
          "lastname" : "Mooney",
          "age" : 39,
          "gender" : "M",
          "address" : "826 Fillmore Place",
          "employer" : "Reversus",
          "email" : "mcgeemooney@reversus.com",
          "city" : "Tooleville",
          "state" : "OK"
        }
      },
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "51",
        "_score" : 0.0,
        "_source" : {
          "account_number" : 51,
          "balance" : 14097,
          "firstname" : "Burton",
          "lastname" : "Meyers",
          "age" : 31,
          "gender" : "F",
          "address" : "334 River Street",
          "employer" : "Bezal",
          "email" : "burtonmeyers@bezal.com",
          "city" : "Jacksonburg",
          "state" : "MO"
        }
      },
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "56",
        "_score" : 0.0,
        "_source" : {
          "account_number" : 56,
          "balance" : 14992,
          "firstname" : "Josie",
          "lastname" : "Nelson",
          "age" : 32,
          "gender" : "M",
          "address" : "857 Tabor Court",
          "employer" : "Emtrac",
          "email" : "josienelson@emtrac.com",
          "city" : "Sunnyside",
          "state" : "UT"
        }
      },
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "121",
        "_score" : 0.0,
        "_source" : {
          "account_number" : 121,
          "balance" : 19594,
          "firstname" : "Acevedo",
          "lastname" : "Dorsey",
          "age" : 32,
          "gender" : "M",
          "address" : "479 Nova Court",
          "employer" : "Netropic",
          "email" : "acevedodorsey@netropic.com",
          "city" : "Islandia",
          "state" : "CT"
        }
      },
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "176",
        "_score" : 0.0,
        "_source" : {
          "account_number" : 176,
          "balance" : 18607,
          "firstname" : "Kemp",
          "lastname" : "Walters",
          "age" : 28,
          "gender" : "F",
          "address" : "906 Howard Avenue",
          "employer" : "Eyewax",
          "email" : "kempwalters@eyewax.com",
          "city" : "Why",
          "state" : "KY"
        }
      },
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "183",
        "_score" : 0.0,
        "_source" : {
          "account_number" : 183,
          "balance" : 14223,
          "firstname" : "Hudson",
          "lastname" : "English",
          "age" : 26,
          "gender" : "F",
          "address" : "823 Herkimer Place",
          "employer" : "Xinware",
          "email" : "hudsonenglish@xinware.com",
          "city" : "Robbins",
          "state" : "ND"
        }
      },
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "222",
        "_score" : 0.0,
        "_source" : {
          "account_number" : 222,
          "balance" : 14764,
          "firstname" : "Rachelle",
          "lastname" : "Rice",
          "age" : 36,
          "gender" : "M",
          "address" : "333 Narrows Avenue",
          "employer" : "Enaut",
          "email" : "rachellerice@enaut.com",
          "city" : "Wright",
          "state" : "AZ"
        }
      },
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "227",
        "_score" : 0.0,
        "_source" : {
          "account_number" : 227,
          "balance" : 19780,
          "firstname" : "Coleman",
          "lastname" : "Berg",
          "age" : 22,
          "gender" : "M",
          "address" : "776 Little Street",
          "employer" : "Exoteric",
          "email" : "colemanberg@exoteric.com",
          "city" : "Eagleville",
          "state" : "WV"
        }
      },
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "272",
        "_score" : 0.0,
        "_source" : {
          "account_number" : 272,
          "balance" : 19253,
          "firstname" : "Lilly",
          "lastname" : "Morgan",
          "age" : 25,
          "gender" : "F",
          "address" : "689 Fleet Street",
          "employer" : "Biolive",
          "email" : "lillymorgan@biolive.com",
          "city" : "Sunbury",
          "state" : "OH"
        }
      }
    ]
  }
}


能看到所有文档的 “_score” : 0.0。


(8)term


和match一样。匹配某个属性的值。全文检索字段用match,其他非text字段匹配用term。

Avoid using the term query for text fields.


避免对文本字段使用“term”查询


By default, Elasticsearch changes the values of text fields as part of analysis. This can make finding exact matches for text field values difficult.


默认情况下,Elasticsearch作为analysis的一部分更改’ text '字段的值。这使得为“text”字段值寻找精确匹配变得困难。


To search text field values, use the match.


要搜索“text”字段值,请使用匹配。


https://www.elastic.co/guide/en/elasticsearch/reference/7.6/query-dsl-term-query.html


使用term匹配查询


GET bank/_search
{
  "query": {
    "term": {
      "address": "mill Road"
    }
  }
}

查询结果:

{
  "took" : 0,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 0,
      "relation" : "eq"
    },
    "max_score" : null,
    "hits" : [ ]
  }
}

一条也没有匹配到

而更换为match匹配时,能够匹配到32个文档

也就是说,全文检索字段用match,其他非text字段匹配用term


(9)Aggregation(执行聚合)

聚合提供了从数据中分组和提取数据的能力。最简单的聚合方法大致等于SQL Group by和SQL聚合函数。在elasticsearch中,执行搜索返回this(命中结果),并且同时返回聚合结果,把以响应中的所有hits(命中结果)分隔开的能力。这是非常强大且有效的,你可以执行查询和多个聚合,并且在一次使用中得到各自的(任何一个的)返回结果,使用一次简洁和简化的API啦避免网络往返。


“size”:0


size:0不显示搜索数据

aggs:执行聚合。聚合语法如下:

"aggs":{
    "aggs_name这次聚合的名字,方便展示在结果集中":{
        "AGG_TYPE聚合的类型(avg,term,terms)":{}
     }
},

搜索address中包含mill的所有人的年龄分布以及平均年龄,但不显示这些人的详情

GET bank/_search
{
  "query": {
    "match": {
      "address": "Mill"
    }
  },
  "aggs": {
    "ageAgg": {
      "terms": {
        "field": "age",
        "size": 10
      }
    },
    "ageAvg": {
      "avg": {
        "field": "age"
      }
    },
    "balanceAvg": {
      "avg": {
        "field": "balance"
      }
    }
  },
  "size": 0
}

查询结果:

{
  "took" : 2,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 4,
      "relation" : "eq"
    },
    "max_score" : null,
    "hits" : [ ]
  },
  "aggregations" : {
    "ageAgg" : {
      "doc_count_error_upper_bound" : 0,
      "sum_other_doc_count" : 0,
      "buckets" : [
        {
          "key" : 38,
          "doc_count" : 2
        },
        {
          "key" : 28,
          "doc_count" : 1
        },
        {
          "key" : 32,
          "doc_count" : 1
        }
      ]
    },
    "ageAvg" : {
      "value" : 34.0
    },
    "balanceAvg" : {
      "value" : 25208.0
    }
  }
}


复杂:

按照年龄聚合,并且求这些年龄段的这些人的平均薪资


GET bank/_search
{
  "query": {
    "match_all": {}
  },
  "aggs": {
    "ageAgg": {
      "terms": {
        "field": "age",
        "size": 100
      },
      "aggs": {
        "ageAvg": {
          "avg": {
            "field": "balance"
          }
        }
      }
    }
  },
  "size": 0
}

输出结果:

{
  "took" : 49,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 1000,
      "relation" : "eq"
    },
    "max_score" : null,
    "hits" : [ ]
  },
  "aggregations" : {
    "ageAgg" : {
      "doc_count_error_upper_bound" : 0,
      "sum_other_doc_count" : 0,
      "buckets" : [
        {
          "key" : 31,
          "doc_count" : 61,
          "ageAvg" : {
            "value" : 28312.918032786885
          }
        },
        {
          "key" : 39,
          "doc_count" : 60,
          "ageAvg" : {
            "value" : 25269.583333333332
          }
        },
        {
          "key" : 26,
          "doc_count" : 59,
          "ageAvg" : {
            "value" : 23194.813559322032
          }
        },
        {
          "key" : 32,
          "doc_count" : 52,
          "ageAvg" : {
            "value" : 23951.346153846152
          }
        },
        {
          "key" : 35,
          "doc_count" : 52,
          "ageAvg" : {
            "value" : 22136.69230769231
          }
        },
        {
          "key" : 36,
          "doc_count" : 52,
          "ageAvg" : {
            "value" : 22174.71153846154
          }
        },
        {
          "key" : 22,
          "doc_count" : 51,
          "ageAvg" : {
            "value" : 24731.07843137255
          }
        },
        {
          "key" : 28,
          "doc_count" : 51,
          "ageAvg" : {
            "value" : 28273.882352941175
          }
        },
        {
          "key" : 33,
          "doc_count" : 50,
          "ageAvg" : {
            "value" : 25093.94
          }
        },
        {
          "key" : 34,
          "doc_count" : 49,
          "ageAvg" : {
            "value" : 26809.95918367347
          }
        },
        {
          "key" : 30,
          "doc_count" : 47,
          "ageAvg" : {
            "value" : 22841.106382978724
          }
        },
        {
          "key" : 21,
          "doc_count" : 46,
          "ageAvg" : {
            "value" : 26981.434782608696
          }
        },
        {
          "key" : 40,
          "doc_count" : 45,
          "ageAvg" : {
            "value" : 27183.17777777778
          }
        },
        {
          "key" : 20,
          "doc_count" : 44,
          "ageAvg" : {
            "value" : 27741.227272727272
          }
        },
        {
          "key" : 23,
          "doc_count" : 42,
          "ageAvg" : {
            "value" : 27314.214285714286
          }
        },
        {
          "key" : 24,
          "doc_count" : 42,
          "ageAvg" : {
            "value" : 28519.04761904762
          }
        },
        {
          "key" : 25,
          "doc_count" : 42,
          "ageAvg" : {
            "value" : 27445.214285714286
          }
        },
        {
          "key" : 37,
          "doc_count" : 42,
          "ageAvg" : {
            "value" : 27022.261904761905
          }
        },
        {
          "key" : 27,
          "doc_count" : 39,
          "ageAvg" : {
            "value" : 21471.871794871793
          }
        },
        {
          "key" : 38,
          "doc_count" : 39,
          "ageAvg" : {
            "value" : 26187.17948717949
          }
        },
        {
          "key" : 29,
          "doc_count" : 35,
          "ageAvg" : {
            "value" : 29483.14285714286
          }
        }
      ]
    }
  }
}

查出所有年龄分布,并且这些年龄段中M的平均薪资和F的平均薪资以及这个年龄段的总体平均薪资

GET bank/_search
{
  "query": {
    "match_all": {}
  },
  "aggs": {
    "ageAgg": {
      "terms": {
        "field": "age",
        "size": 100
      },
      "aggs": {
        "genderAgg": {
          "terms": {
            "field": "gender.keyword"
          },
          "aggs": {
            "balanceAvg": {
              "avg": {
                "field": "balance"
              }
            }
          }
        },
        "ageBalanceAvg": {
          "avg": {
            "field": "balance"
          }
        }
      }
    }
  },
  "size": 0
}

输出结果:

{
  "took" : 119,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 1000,
      "relation" : "eq"
    },
    "max_score" : null,
    "hits" : [ ]
  },
  "aggregations" : {
    "ageAgg" : {
      "doc_count_error_upper_bound" : 0,
      "sum_other_doc_count" : 0,
      "buckets" : [
        {
          "key" : 31,
          "doc_count" : 61,
          "genderAgg" : {
            "doc_count_error_upper_bound" : 0,
            "sum_other_doc_count" : 0,
            "buckets" : [
              {
                "key" : "M",
                "doc_count" : 35,
                "balanceAvg" : {
                  "value" : 29565.628571428573
                }
              },
              {
                "key" : "F",
                "doc_count" : 26,
                "balanceAvg" : {
                  "value" : 26626.576923076922
                }
              }
            ]
          },
          "ageBalanceAvg" : {
            "value" : 28312.918032786885
          }
        }
      ]
        .......//省略其他
    }
  }
}


相关实践学习
使用阿里云Elasticsearch体验信息检索加速
通过创建登录阿里云Elasticsearch集群,使用DataWorks将MySQL数据同步至Elasticsearch,体验多条件检索效果,简单展示数据同步和信息检索加速的过程和操作。
ElasticSearch 入门精讲
ElasticSearch是一个开源的、基于Lucene的、分布式、高扩展、高实时的搜索与数据分析引擎。根据DB-Engines的排名显示,Elasticsearch是最受欢迎的企业搜索引擎,其次是Apache Solr(也是基于Lucene)。 ElasticSearch的实现原理主要分为以下几个步骤: 用户将数据提交到Elastic Search 数据库中 通过分词控制器去将对应的语句分词,将其权重和分词结果一并存入数据 当用户搜索数据时候,再根据权重将结果排名、打分 将返回结果呈现给用户 Elasticsearch可以用于搜索各种文档。它提供可扩展的搜索,具有接近实时的搜索,并支持多租户。
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