Elasticsearch聚合分析简介

青旅半醒 2023-07-07 11:28 30阅读 0赞

### 1）环境准备 ###

启动Elasticsearch https://blog.csdn.net/qq\_36918149/article/details/104221934  
启动Kinbana https://blog.csdn.net/qq\_36918149/article/details/104224625  
备注：一定要提前导入demo数据

### 2）哪些场景在用聚合分析？ ###

场景一：搜索页面预览统计  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM2OTE4MTQ5_size_16_color_FFFFFF_t_70]  
一般用于检索页面，分组统计。  
场景二：Kibana 可视化报表-聚合分析  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM2OTE4MTQ5_size_16_color_FFFFFF_t_70 1]

### 3）什么是聚合（Aggregation）？ ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM2OTE4MTQ5_size_16_color_FFFFFF_t_70 2]

### 4）集合的分类 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM2OTE4MTQ5_size_16_color_FFFFFF_t_70 3]

### 5）Bucket&Metric 与sql对比 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM2OTE4MTQ5_size_16_color_FFFFFF_t_70 4]

### 6）桶（Bucket） ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM2OTE4MTQ5_size_16_color_FFFFFF_t_70 5]

### 7）指标（Metric） ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM2OTE4MTQ5_size_16_color_FFFFFF_t_70 6]

### 8）桶（Bucket）演示 ###

#按照目的地进行分桶统计
    GET kibana_sample_data_flights/_search
    { 
    	"size": 0,
    	"aggs":{ 
    		"flight_dest":{ 
    			"terms":{ 
    				"field":"DestCountry"
    			}
    		}
    	}
    }

结果：下图结果中看出按目的地进行了航班班次统计  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM2OTE4MTQ5_size_16_color_FFFFFF_t_70 7]

### 9）指标（Metric）演示 ###

#查看航班目的地的统计信息，增加平均，最高最低价格
    GET kibana_sample_data_flights/_search
    { 
    	"size": 0,
    	"aggs":{ 
    		"flight_dest":{ 
    			"terms":{ 
    				"field":"DestCountry"
    			},
    			"aggs":{ 
    				"avg_price":{ 
    					"avg":{ 
    						"field":"AvgTicketPrice"
    					}
    				},
    				"max_price":{ 
    					"max":{ 
    						"field":"AvgTicketPrice"
    					}
    				},
    				"min_price":{ 
    					"min":{ 
    						"field":"AvgTicketPrice"
    					}
    				}
    			}
    		}
    	}
    }

结果：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM2OTE4MTQ5_size_16_color_FFFFFF_t_70 8]  
9）嵌套演示

#价格统计信息+天气信息
    GET kibana_sample_data_flights/_search
    { 
    	"size": 0,
    	"aggs":{ 
    		"flight_dest":{ 
    			"terms":{ 
    				"field":"DestCountry"
    			},
    			"aggs":{ 
    				"stats_price":{ 
    					"stats":{ 
    						"field":"AvgTicketPrice"
    					}
    				},
    				"wather":{ 
    				  "terms": { 
    				    "field": "DestWeather",
    				    "size": 5
    				  }
    				}
    
    			}
    		}
    	}
    }

结果：按DestCountry分桶后，按票价AvgTicketPrice进行继续count、nim、max、avg并按DestWeather字段再次分桶统计  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM2OTE4MTQ5_size_16_color_FFFFFF_t_70 9]

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