You know, for search

# 測驗ES是否啟動成功

GET ?pretty

# 計算集群中檔案的數量

GET /_count?pretty
{
  "query": {
    "match_all": {}
  }
}

# 創建索引
# 有則追加資料，無索引則默認創建
# 索引名/型別名稱/id

PUT /megacorp/employee/1
{
  "first_name" : "John",
  "last_name" : "Smith",
  "age" : 25,
  "about" : "I love to go rock climbing",
  "interests" : ["sports", "music"]
}

PUT /megacorp/employee/2
{
  "first_name" : "Jane",
  "last_name" : "Smith",
  "age" : 32,
  "about" : "I like to collect rock albums",
  "interests" : ["music"]
}

PUT /megacorp/employee/3
{
  "first_name" : "Douglas",
  "last_name" : "Fir",
  "age" : 35,
  "about" : "I like to build cabinets",
  "interests" : ["forestry"]
}

# 檢索檔案
# _source屬性是原始json檔案

GET /megacorp/employee/1
GET /megacorp/employee/2
GET /megacorp/employee/3

# 更新檔案
# 只需再次PUT就可以
# 注意，完全覆寫更新，包括減少欄位

PUT /megacorp/employee/3
{
  "interests" : ["forestry", "programming1"]
}

# 洗掉檔案

DELETE /megacorp/employee/3

# 檢查檔案是否存在

HEAD /megacorp/employee/3

# 搜索所有雇員資訊
# 回傳的結果在hits中

GET /megacorp/employee/_search

# 使用query-string進行輕量化搜索

GET /megacorp/employee/_search?q=last_name:Smith

# 使用查詢運算式搜索
# 查詢型別 match

GET /megacorp/employee/_search
{
  "query": {
    "match": {
      "last_name": "Smith"
    }
  }
}

# 使用更復雜的搜索
# 查詢Smith員工，年齡要大于30歲的

GET /megacorp/employee/_search
{
  "query": {
    "bool": {
      "must": {
        "match" : {
          "last_name" : "Smith"
        }
      } ,
      "filter": {
        "range": {
          "age": {
            "gt": 30
          }
        }
      }
    }
  }
}

# 全文搜索
# match基于詞搜索

GET /megacorp/employee/_search
{
  "query": {
    "match": {
      "about": "rock climbing"
    }
  }
}

# match_phrase基于短語搜索

GET /megacorp/employee/_search
{
  "query": {
    "match_phrase": {
      "about": "rock climbing"
    }
  }
}

#高亮搜索

GET /megacorp/employee/_search
{
  "query": {
    "match": {
      "about": "rock climbing"
    }
  },
  "highlight": {
    "fields": {
      "about": {}
    }
  }
}

# 分析
# 最受歡迎的愛好

GET /megacorp/employee/_search
{
  "aggs": {
    "all_interests": {
      "terms": {
        "field": "interests.keyword"
      }
    }
  }
}

# Smith中最受歡迎的愛好

GET /megacorp/employee/_search
{
  "query": {
    "match": {
      "last_name": "Smith"
    }
  },
  "aggs": {
    "all_interests": {
      "terms": {
        "field": "interests.keyword"
      }
    }
  }
}

# 匯總

GET /megacorp/employee/_search
{
  "aggs": {
    "all_interests": {
      "terms": {
        "field": "interests.keyword"
      },
      "aggs": {
        "avg_age": {
          "avg": {
            "field": "age"
          }
        }
      }
    }
  }
}

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