es两个索引聚合查询_ElasticSearch(7.2.2)-es聚合查询之桶聚合

简介：⼿把⼿玩转es的聚合查询之桶聚合

ES聚合分析

聚合分析是数据库中重要的功能特性，完成对⼀个查询的数据集中数据的聚合计算，如：找出某字段(或计算表达式的结果)的最⼤值、最⼩值，计算和、平均值等。ES作为搜索引擎兼数据库，同样提供了强⼤的聚合分析能⼒。

对⼀个数据集求最⼤、最⼩、和、平均值等指标的聚合，在ES中称为指标聚合

关系型数据库中除了有聚合函数外，还可以对查询出的数据进⾏分组group by，再在组上进⾏指标聚合。在ES中称为桶聚合

Terms Aggregation 根据字段项分组聚合

⽕箭队根据年龄进⾏分组

POST /nba/_search

{

"query": {

"term": {

"teamNameEn": {

"value": "Rockets"

}

}

},

"aggs": {

"aggsAge": {

"terms": {

"field": "age",

"size": 10

}

}

},

"size": 0

}

order 分组聚合排序

⽕箭队根据年龄进⾏分组，分组信息通过年龄从⼤到⼩排序 (通过指定字段)

POST /nba/_search

{

"query": {

"term": {

"teamNameEn": {

"value": "Rockets"

}

}

},

"aggs": {

"aggsAge": {

"terms": {

"field": "age",

"size": 10,

"order": {

"_key": "desc"

}

}

}

},

"size": 0

}

⽕箭队根据年龄进⾏分组，分组信息通过⽂档数从⼤到⼩排序 (通过⽂档数)

POST /nba/_search

{

"query": {

"term": {

"teamNameEn": {

"value": "Rockets"

}

}

},

"aggs": {

"aggsAge": {

"terms": {

"field": "age",

"size": 10,

"order": {

"_count": "desc"

}

}

}

},

"size": 0

}

每⽀球队按该队所有球员的平均年龄进⾏分组排序 (通过分组指标值)

POST /nba/_search

{

"aggs": {

"aggsTeamName": {

"terms": {

"field": "teamNameEn",

"size": 30,

"order": {

"avgAge": "desc"

}

},

"aggs": {

"avgAge": {

"avg": {

"field": "age"

}

}

}

}

},

"size": 0

}

筛选分组聚合

湖⼈和⽕箭队按球队平均年龄进⾏分组排序 (指定值列表)

POST /nba/_search

{

"aggs": {

"aggsTeamName": {

"terms": {

"field": "teamNameEn",

"include": ["Lakers", "Rockets", "Warriors"],

"exclude": ["Warriors"],

"size": 30,

"order": {

"avgAge": "desc"

}

},

"aggs": {

"avgAge": {

"avg": {

"field": "age"

}

}

}

}

},

"size": 0

}

湖⼈和⽕箭队按球队平均年龄进⾏分组排序 (正则表达式匹配值)

POST / nba / _search

{

"aggs": {

"aggsTeamName": {

"terms": {

"field": "teamNameEn",

"include": "Lakers|Ro.*|Warriors.*",

"exclude": "Warriors",

"size": 30,

"order": {

"avgAge": "desc"

}

},

"aggs": {

"avgAge": {

"avg": {

"field": "age"

}

}

}

}

},

"size": 0

}

Range Aggregation 范围分组聚合

NBA球员年龄按20,20-35,35这样分组

POST /nba/_search

{

"aggs": {

"ageRange": {

"range": {

"field": "age",

"ranges": [{

"to": 20,

"key": "A"

},

{

"from": 20,

"to": 35,

"key": "B"

},

{

"from": 35,

"key": "C"

}

]

}

}

},

"size": 0

}

Date Range Aggregation 时间范围分组聚合

NBA球员按出⽣年⽉分组

POST /nba/_search

{

"aggs": {

"birthDayRange": {

"date_range": {

"field": "birthDay",

"format": "MM-yyy",

"ranges": [{

"to": "01-1989"

},

{

"from": "01-1989",

"to": "01-1999"

},

{

"from": "01-1999",

"to": "01-2009"

},

{

"from": "01-2009"

}

]

}

}

},

"size": 0

}

Date Histogram Aggregation 时间柱状图聚合

按天、⽉、年等进⾏聚合统计。可按 year (1y), quarter (1q), month (1M), week (1w), day(1d), hour (1h), minute (1m), second (1s) 间隔聚合

NBA球员按出⽣年分组

POST /nba/_search

{

"aggs": {

"birthday_aggs": {

"date_histogram": {

"field": "birthDay",

"format": "yyyy",

"interval": "year"

}

}

},

"size": 0

}

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