ElasticSearch的聚合(Aggregations)引入了两个概念: 桶(Buckets): 满足特定条件的文档的集合 指标(Metrics): 对桶内的文档进行统计计算 每个聚合都是多个桶和指标的组合。和sql的聚合语法对比: SELECT COUNT(color) FROM table_xxx GROUP BY co...