Elasticsearch之基本查询及组合查询操作示例

#添加映射 PUT lago { "mappings": { "properties":{ "title":{ "stort":true, "type":"text", "analyzer":"ik_max_word" }, "company_name":{ "stort":true, "type":"keyword", }, "desc":{ "type":"text" }, "comments":{ "type":"integer" }, "add_time":{ "type":"date", "format":"yyy-MM-dd" } } } } #测试数据 POST lago/job { "title":"python django 开发工程师", "company_name":"美团科技有限公司", "desc":"对django熟悉，掌握mysql和非关系型数据库，网站开发", "comments:200, "add_time":"2018-4-1" } POST lago/job { "title":"python数据分析", "company_name":"百度科技有限公司", "desc":"熟悉python基础语法，熟悉数据分析", "comments:5, "add_time":"2018-10-1" } POST lago/job { "title":"python自动化运维", "company_name":"上海华为", "desc":"熟悉python基础语法，精通Linux", "comments:90, "add_time":"2019-9-18" } 

GET lagou/job/_search { "query":{ "match":{ "title":"python" } } } #因为title字段做了分词，python都能搜索出来 #搜索python网站也能搜索出来，把python和网站分成两个词 #搜索爬取也能搜索到，把爬和取分词，去搜索 #只搜取 搜不到 

GET lagou/_search { "query":{ "term":{ "title":"python" } } } #会拿着要查询的词不做任何处理，直接查询 #用python爬虫，查不到，用match就能查到 { "query":{ "term":{ "company_name":"美团" } } } #通过美团，就查询不到 

GET lagou/_search { "query":{ "terms":{ "title":["工程师","django","运维"] } } } #三个词，只要有一个，就会查询出来 

GET lagou/_search { "query":{ "match":{ "title":"python" } }， "form":1, "size":2 } #从第一条开始，大小为2 

GET lagou/_search { "query":{ "match_all":{} } } #所有数据都返回 

GET lagou/_search { "query":{ "match_phrase":{ "title":{ "query":"python系统", "slop":6 } } } } #短语查询， #会把查询条件python和系统分词，放到列表中，再去搜索的时候，必须满足python和系统同时存在的才能搜出来 #"slop":6 ：python和系统这两个词之间最小的距离 

GET lagou/_search { "query":{ "multy_match":{ "query":"python", "fields":["title","desc"] } } } #可以指定多个字段 #比如查询title和desc这个两个字段中包含python关键词的文档 #"fields":["title^3","desc"]:权重，title中的python是desc中的三倍 

GET lagou/_search { "query":{ "stored_fields":["title","company_name"] "match":{ "title":"python" } } } #只返回title和company_name字段 #"stored_fields":["title","company_name",'dsc'],不会返回dsc，因为我们要求stroed_fields，之前desc字段设为false（默认），不会显示 

GET lagou/_search { "query":{ "match_all":{} }, "sort":[ { "comments":{ "order":"desc" } } ] } #查询所有文档，按comments按desc降序排序 

GET lagou/_search { "query":{ "range":{ "comments":{ "gte":10, "lte":20, "boost":2.0 } } } } #指定comments字段大于等于10，小于等于20 #boost：权重 GET lagou/_search { "query":{ "range":{ "add_time":{ "gte":"2019-10-11", "lte":"now", } } } } #对时间进行查询 

GET lagou/_search { "query":{ "wildcard":{ "title":{ "value":"pyth*n", "boost":2.0 } } } } #模糊查询，title中，有pyth任意值n得都能查出来 

exists:字段包含，存在的 # 包含followers_count字段 GET user_toutiao/_search { "query": { "bool": { "must": [ {"exists": { "field": "followers_count" }} ] } } } # 不包含followers_count字段 GET user_toutiao/_count { "query": { "bool": { "must_not": [ {"exists": { "field": "followers_count" }} ] } } } # 不包含followers_count且updata_timestamp>1614221216 GET user_toutiao/_count { "query": { "bool": { "must_not": [ { "exists": { "field": "followers_count" } } ], "must": [ {"range": { "updata_timestamp": { "gt": 1614221216 } }} ] } } } 

#bool查询包括must should must_not filter ''' bool:{ "filter":[],   字段过滤 "must":[],     所有查询条件都满足 "should":[],   满足一个或多个 "must_not":{}  都不满足于must相反 } ''' # 建立测试数据 POST lago/testjob/_bulk {"index":{"_id":1}} {"salary":10,"title":"Python"} {"index":{"_id":2}} {"salary":20,"title":"Scrapy"} {"index":{"_id":3}} {"salary":30,"title":"Django"} {"index":{"_id":4}} {"salary":30,"title":"Elasticsearch"} 

#select * from testjob where salary=20 GET lagou/testjob/_search { "query":{ "bool":{ "must":{ "match_all":{} }, "filter":{ "term":{ "salary":20 } } } } } 

#查询薪资是10k或20k的 GET lagou/testjob/_search { "query":{ "bool":{ "must":{ "match_all":{} }, "filter":{ "terms":{ "salary":[10,20] } } } } } #select * from testjob where title="python" GET lagou/testjob/_search { "query":{ "bool":{ "must":{ "match_all":{} }, "filter":{ "term":{ "title":"Python" } } } } } #title 是text字段，会做大小写转换，term不会预处理，拿着大写Python去查查不到 #可以改成小写，或者用match来查询 ''' "filter":{ "match":{ "title":"Python" } } ''' #查看分析器解析结果 GET _analyze { "analyzer":"ik_max_word", "text":"python网络开发工程师" } 

#select * from testjob where (salary=20 or title=Python) and (salary!=30) #查询薪资等于20k或者工作为python的工作，排除价格为30k的 { "query":{ "bool":{ "should":[ {"term":{"salary":20}}, {"term":{"title":"python"}} ], "must_not":{ "term":{"salary":30} } } } } #select * from testjob where title=python or (title=django and salary=30) { "query":{ "bool":{ "should":[ {"term":{"title":"python"}}, { "bool":{ "must":[ {"term":{"title":"django"}}, {"term":{"salary":30}} ] } } ] } } }