Elasticsearch之-查询
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# 并且和或者的条件 #并且 GET t3/doc/_search { "query": { "bool": { "must": [ { "match": { "title": "beautiful" } }, { "match": { "desc": "beautiful" } } ] } } } #或者 GET t3/doc/_search { "query": { "bool": { "should": [ { "match": { "title": "beautiful" } }, { "match": { "desc": "beautiful" } } ] } } } # match,term和terms的区别 -match查的短语会分词 GET w10/_doc/_search { "query": { "match": { "t1": "Beautiful girl!" } } } -term查的不会分词 GET w10/_doc/_search { "query": { "term": { "t1": "girl" } } } -terms由于部分词,想查多个,terms GET w10/_doc/_search { "query": { "terms": { "t1": ["beautiful", "sexy"] } } } # pymysql 原生操作,查出字典 # orm orm直接转成对象
##### 不是所有字段都支持排序,只有数字类型,字符串不支持 GET lqz/_doc/_search { "query": { "match": { "from": "gu" } } } #降序 GET lqz/_doc/_search { "query": { "match": { "from": "gu" } }, "sort": [ { "age": { "order": "desc" } } ] } ## 升序 GET lqz/_doc/_search { "query": { "match": { "from": "gu" } }, "sort": [ { "age": { "order": "asc" } } ] } GET lqz/_doc/_search { "query": { "match_all": { } }, "sort": [ { "age": { "order": "asc" } } ] }
#从第二条开始,取一条 GET lqz/_doc/_search { "query": { "match_all": {} }, "sort": [ { "age": { "order": "desc" } } ] } GET lqz/_doc/_search { "query": { "match_all": {} }, "sort": [ { "age": { "order": "desc" } } ], "from": 2, "size": 2 } ###注意:对于`elasticsearch`来说,所有的条件都是可插拔的,彼此之间用`,`分割 GET lqz/_doc/_search { "query": { "match_all": {} }, "from": 2, "size": 2 }
- must(and) - should(or) - must_not(not) ##布尔查询之must and条件 GET lqz/_doc/_search { "query": { "bool": { "must": [ { "match": { "from": "gu" } }, { "match": { "name": "顾老二" } } ] } } } ##布尔查询之should or条件 GET lqz/_doc/_search { "query": { "bool": { "should": [ { "match": { "from": "gu" } }, { "match": { "name": "龙套偏房" } } ] } } } ### must_not条件 都不是 GET lqz/_doc/_search { "query": { "bool": { "must_not": [ { "match": { "from": "gu" } }, { "match": { "tags": "可爱" } }, { "match": { "age": 18 } } ] } } } ###filter,大于小于的条件 gt lt gte lte GET lqz/_doc/_search { "query": { "bool": { "must": [ { "match": { "from": "gu" } } ], "filter": { "range": { "age": { "lt": 30 } } } } } } ### 范围查询 GET lqz/_doc/_search { "query": { "bool": { "must": [ { "match": { "from": "gu" } } ], "filter": { "range": { "age": { "gte": 25, "lte": 30 } } } } } } ### filter需要在bool内部,并且如果是and条件,需要用must,如果使用了should,会认为是should和filter是或者的关系
-
-
should
:或关系,相当于关系型数据库中的or
。 -
must_not
:非关系,相当于关系型数据库中的not
。 -
filter
:过滤条件。 -
range
:条件筛选范围。 -
gt
:大于,相当于关系型数据库中的>
。 -
gte
:大于等于,相当于关系型数据库中的>=
。 -
lt
:小于,相当于关系型数据库中的<
。 -
lte
:小于等于,相当于关系型数据库中的<=
###基本使用 GET lqz/_doc/_search { "query": { "match_all": { } }, "_source":["name","age"] } ####_source和query是平级的 GET lqz/_doc/_search { "query": { "bool": { "must":{ "match":{"from":"gu"} }, "filter": { "range": { "age": { "lte": 25 } } } } }, "_source":["name","age"] }
GET lqz/_doc/_search { "query": { "match": { "from": "gu" } }, "highlight": { "pre_tags": "<b class=\'key\' style=\'color:red\'>", "post_tags": "</b>", "fields": { "from": {} } } }
# sum ,avg, max ,min # select max(age) as my_avg from 表 where from=gu; GET lqz/_doc/_search { "query": { "match": { "from": "gu" } }, "aggs": { "my_avg": { "avg": { "field": "age" } } }, "_source": ["name", "age"] } #最大年龄 GET lqz/_doc/_search { "query": { "match": { "from": "gu" } }, "aggs": { "my_max": { "max": { "field": "age" } } }, "_source": ["name", "age"] } #最小年龄 GET lqz/_doc/_search { "query": { "match": { "from": "gu" } }, "aggs": { "my_min": { "min": { "field": "age" } } }, "_source": ["name", "age"] } # 总年龄 #最小年龄 GET lqz/_doc/_search { "query": { "match": { "from": "gu" } }, "aggs": { "my_sum": { "sum": { "field": "age" } } }, "_source": ["name", "age"] } #分组 # 现在我想要查询所有人的年龄段,并且按照`15~20,20~25,25~30`分组,并且算出每组的平均年龄。 GET lqz/_doc/_search { "size": 0, "query": { "match_all": {} }, "aggs": { "age_group": { "range": { "field": "age", "ranges": [ { "from": 15, "to": 20 }, { "from": 20, "to": 25 }, { "from": 25, "to": 30 } ] } } } }
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