Elasticsearch 顶尖高手(6)--快速入门案例实战:group by + avg + sort等聚合分析(三)

1.计算每个tag下的商品数量

GET /ecommerce/product/_search

{

     “aggs”:{

          “group_by_tags”:{

                 “terms”:{“field”:”tags”}

           }

     }

}

Elasticsearch 顶尖高手(6)--快速入门案例实战:group by + avg + sort等聚合分析(三)

将文本field的fielddate属性设置为true

PUT /ecommerce/_mapping/product

{

      “properties”:{

            “tags”:{

                “type”:”text”,

                “fielddata”:true

           }

      }

}

Elasticsearch 顶尖高手(6)--快速入门案例实战:group by + avg + sort等聚合分析(三)

重新执行分组命令

“size”:0

可以不显示聚合分析数据的信息,只返回聚合分析之后的结果

Elasticsearch 顶尖高手(6)--快速入门案例实战:group by + avg + sort等聚合分析(三)


2.对名称中包含yagao 的商品,计算每个tag下的商品数量

GET /ecommerce/product/_search
{
   "size": 0,
   "query": {
     "match": {
       "name": "yagao"
     }
   },
   "aggs": {
     "group_by_tags": {
       "terms": {
         "field": "tags"
       }
     }
   }
}

Elasticsearch 顶尖高手(6)--快速入门案例实战:group by + avg + sort等聚合分析(三)

结果一样,因为每个商品name中都包含有yagao

3.先分组,再算每组的平均值,计算每个tag下的商品的平均价格

GET /ecommerce/product/_search

{

      “size”:0,

      “aggs”:{

            “group_by_tags”:{

                     “terms”:{“fiedd”:”tags”},

                     “aggs”:{

                           “avg_price”:{

                                    “avg”:{“field”:”price”}

                             }

                     }

             }

      }

}

Elasticsearch 顶尖高手(6)--快速入门案例实战:group by + avg + sort等聚合分析(三)


4.在3的基础上,按照平均价格进行排序

GET /ecommerce/product/_search

{

      “size”:0,

      “aggs”:{

            “group_by_tags”:{

                     “terms”:{“fiedd”:”tags”,“order”:{“avg_price”:”desc”}},

                     “aggs”:{

                           “avg_price”:{

                                    “avg”:{“field”:”price”}

                             }

                     }

             }

      }

}

Elasticsearch 顶尖高手(6)--快速入门案例实战:group by + avg + sort等聚合分析(三)

5.按照指定的价格范围区间进行分组,然后在每组内按照tag进行分组,最后再计算每组的平均价格

GET /ecommerce/product/_search
{
   "size": 0,
   "aggs": {
   "group_by_price": {
       "range": {
         "field": "price",
         "ranges": [
           {
             "from": 0,
             "to": 20
           },
           {
             "from": 20,
             "to": 40
           },
           {
             "from": 40,
             "to": 50
           }
         ]
       },
       "aggs": {
         "group_by_tag": {
           "terms": {
             "field": "tags",
             "order": {
               "avg_by_price": "desc"
             }
           },
           "aggs": {
             "avg_by_price": {
               "avg": {
                 "field": "price"
               }
             }
           }
         }
       }
     }
   }
}

Elasticsearch 顶尖高手(6)--快速入门案例实战:group by + avg + sort等聚合分析(三)

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