正经学徒，佛系记录，不搞事情
首先创建索引mapping，添加测试数据（由于目的是为了测试聚合，因此设置成keyword不分词）
PUT transcripts
{
"mappings":{
"transcripts":{
"properties": {
"name":{
"type":"keyword"
},
"score":{
"type":"keyword"
},
"sex":{
"type":"keyword"
}
}
}
}
}测试数据如下：
| name | sex | score |
| 张三 | 男 | 100 |
| 张三 | 女 | 90 |
| 李四 | 男 | 80 |
| 李四 | 男 | 70 |
如果是单纯的想获取去重后对应数量：
获取所有名字所对应的数量：
POST transcripts/transcripts/_search
{
"query": {
"match_all": {}
},
"size": 0,//统计是不需要原数据的
"aggs": {
"nameAlias": {//别名
"terms": {
"field": "name", //distinct的字段
"size":10
}
}
}
}结果：名为张三和李四的各两人
获取所有名字下所有性别所对应的数量：
POST transcripts/transcripts/_search
{
"query": {
"match_all": {}
},
"size": 0,
"aggs": {
"nameAlias": {
"terms": {
"field": "name",
"size":10
},
"aggs": {
"sexAlias": {
"terms": {
"field": "sex",
"size":10
}
}
}
}
}
}结果：张三下有1个女性，1一个男性，李四下有2个男性
如果想获取每个记录的具体值（即想要获取具体的分数）：
主要语法如下：
"aggs": {
"alias": {//别名
"top_hits": {
"size": 1//返回第n条匹配的值
}
}
}获取所有名字匹配的一条的数据：
POST transcripts/transcripts/_search
{
"query": {
"match_all": {}
},
"size": 0,
"aggs": {
"nameAlias": {
"terms": {
"field": "name",
"size":10
},
"aggs": {
"alias1": {
"top_hits": {
"size": 1
}
}
}
}
}
}结果：_source 下展示了所有的文档数据
获取所有名字下所有性别匹配的一条数据：
POST transcripts/transcripts/_search
{
"query": {
"match_all": {}
},
"size": 0,
"aggs": {
"nameAlias": {
"terms": {
"field": "name",
"size":10
},
"aggs": {
"sexAlias": {
"terms": {
"field": "sex",
"size":10
},
"aggs": {
"alias1": {
"top_hits": {
"size": 1
}
}
}
}
}
}
}
}
结果：_source 下展示了所有的文档数据
"aggregations": {
"nameAlias": {
"doc_count_error_upper_bound": 0,
"sum_other_doc_count": 0,
"buckets": [
{
"key": "张三",
"doc_count": 2,
"sexAlias": {
"doc_count_error_upper_bound": 0,
"sum_other_doc_count": 0,
"buckets": [
{
"key": "女",
"doc_count": 1,
"alias1": {
"hits": {
"total": 1,
"max_score": 1,
"hits": [
{
"_index": "transcripts",
"_type": "transcripts",
"_id": "FU7koWgB2ZoT18WIeKTI",
"_score": 1,
"_source": {
"name": "张三",
"sex": "女",
"score": "90"
}
}
]
}
}
},
{
"key": "男",
"doc_count": 1,
"alias1": {
"hits": {
"total": 1,
"max_score": 1,
"hits": [
{
"_index": "transcripts",
"_type": "transcripts",
"_id": "FE7koWgB2ZoT18WISaTx",
"_score": 1,
"_source": {
"name": "张三",
"sex": "男",
"score": "100"
}
}
]
}
}
}
]
}
},
{
"key": "李四",
"doc_count": 2,
"sexAlias": {
"doc_count_error_upper_bound": 0,
"sum_other_doc_count": 0,
"buckets": [
{
"key": "男",
"doc_count": 2,
"alias1": {
"hits": {
"total": 2,
"max_score": 1,
"hits": [
{
"_index": "transcripts",
"_type": "transcripts",
"_id": "F07koWgB2ZoT18WItaQZ",
"_score": 1,
"_source": {
"name": "李四",
"sex": "男",
"score": "70"
}
}
]
}
}
}
]
}
}
]
}
}