es 聚合查询

多字段分组并求和；实现sql:select field1, field2, sum(field3) from table_name group by field1, field2;

多字段分组并求和；实现sql:select field1, field2, top(field3) from table_name group by field1, field2;

/**
 * 多字段分组并求和；实现sql:select field1, field2, sum(field3) from table_name group by field1, field2;
 */
@Test
public void sumAfterTwiceAgg() {
    SearchResponse response = client.prepareSearch("test_index").setTypes("tweet")
            .addAggregation(AggregationBuilders.terms("userAgg").field("user.keyword")
                    .subAggregation(AggregationBuilders.terms("sexAgg").field("sex.keyword")
                            .subAggregation(AggregationBuilders.sum("sumAgg").field("age"))))  //求和要放到最内层的分组语句里面

            .get();
    Terms userAgg = response.getAggregations().get("userAgg");
    for (Terms.Bucket entry : userAgg.getBuckets()) {
        Terms sexAgg = entry.getAggregations().get("sexAgg");
        for (Terms.Bucket entry2 : sexAgg.getBuckets()) {
            Sum sum = entry2.getAggregations().get("sumAgg");
            System.out.println("user:" + entry.getKey()+"-------sex:"+entry2.getKey() + "----------sum:" + sum.getValue());
        }
    }
}