#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"
      }
    }
  }
}
#測試數據
POST lago/job
{
  "title":"python django 開發工程師",
  "company_name":"美團科技有限公司",
  "desc":"對django熟悉，掌握mysql和非關系型數據庫，網站開發",
  "comments:200,
  "add_time":"2018-4-1"
}
POST lago/job
{
  "title":"python數據分析",
  "company_name":"百度科技有限公司",
  "desc":"熟悉python基礎語法，熟悉數據分析",
  "comments:5,
  "add_time":"2018-10-1"
}
POST lago/job
{
  "title":"python自動化運維",
  "company_name":"上海華為",
  "desc":"熟悉python基礎語法，精通Linux",
  "comments:90,
  "add_time":"2019-9-18"
}

GET lagou/job/_search
{
  "query":{
    "match":{
      "title":"python"
    }
  }
}
#因為title字段做了分詞，python都能搜索出來
#搜索python網站也能搜索出來，把python和網站分成兩個詞
#搜索爬取也能搜索到，把爬和取分詞，去搜索
#只搜取 搜不到

GET lagou/_search
{
  "query":{
    "term":{
      "title":"python"
    }
  }
}
#會拿著要查詢的詞不做任何處理，直接查詢
#用python爬蟲，查不到，用match就能查到
{
  "query":{
    "term":{
      "company_name":"美團"
    }
  }
}
#通過美團，就查詢不到

GET lagou/_search
{
  "query":{
    "terms":{
      "title":["工程師","django","運維"]
    }
  }
}
#三個詞，只要有一個，就會查詢出來

GET lagou/_search
{
  "query":{
    "match":{
      "title":"python"
    }
  }，
  "form":1,
  "size":2
}
#從第一條開始，大小為2

GET lagou/_search
{
  "query":{
    "match_all":{}
  }
}
#所有數據都返回

GET lagou/_search
{
  "query":{
    "match_phrase":{
      "title":{
        "query":"python系統",
        "slop":6
      }
    }
  }
}
#短語查詢， 
#會把查詢條件python和系統分詞，放到列表中，再去搜索的時候，必須滿足python和系統同時存在的才能搜出來
#"slop":6 ：python和系統這兩個詞之間最小的距離

GET lagou/_search
{
  "query":{
    "multy_match":{
   			"query":"python",
      	"fields":["title","desc"]
    }
  }
}
#可以指定多個字段
#比如查詢title和desc這個兩個字段中包含python關鍵詞的文檔
#"fields":["title^3","desc"]:權重，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'],不會返回dsc，因為我們要求stroed_fields，之前desc字段設為false（默認），不會顯示

GET lagou/_search
{
  "query":{
 			"match_all":{}
  },
  "sort":[
    {
      "comments":{
        "order":"desc"
      }
    }
  ]
}
#查詢所有文檔，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：權重
GET lagou/_search
{
  "query":{
 			"range":{
        "add_time":{
          "gte":"2019-10-11",
          "lte":"now",
        }
      }
  }
}
#對時間進行查詢

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

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查詢包括must should must_not filter
'''
bool:{
	"filter":[],   字段過濾
	"must":[],     所有查詢條件都滿足
	"should":[],   滿足一個或多個
	"must_not":{}  都不滿足于must相反
}
'''
# 建立測試數據
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
          }
        }
      }
  }
}

#查詢薪資是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，會做大小寫轉換，term不會預處理，拿著大寫Python去查查不到
#可以改成小寫，或者用match來查詢
'''
   "filter":{
          "match":{
            "title":"Python"
          }
        }
'''
#查看分析器解析結果
GET _analyze
{
  "analyzer":"ik_max_word",
  "text":"python網絡開發工程師"
}

#select * from testjob where (salary=20 or title=Python) and (salary!=30)
#查詢薪資等于20k或者工作為python的工作，排除價格為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}}
            ]
          }
        }
      ]
    }
  }
}