# Group\_concat aggragation

**URL:** <https://discuss.elastic.co/t/group-concat-aggragation/256285>\
**Category:** Elasticsearch\
**Created:** [November 22, 2020, 9:15pm UTC](https://discuss.elastic.co/t/group-concat-aggragation/256285 "2020-11-22T21:15:40Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![chupacabra](https://avatars.discourse-cdn.com/v4/letter/c/51bf81/32.png) [@chupacabra](https://discuss.elastic.co/u/chupacabra)\
**Post date:** [November 22, 2020, 9:15pm UTC](https://discuss.elastic.co/t/group-concat-aggragation/256285/1 "2020-11-22T21:15:40Z")

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Hello everybody. I am new to elasticsearch and I would like to create a group\_concat aggregation. But I don't know how. Can someone help me please.

The example data:

```auto
    POST /example_measures/_bulk
    {"index":{"_id":1}}
    {"id":"1","datapoint_id":"1","datetime":"1577833200000","value":"5"}
    {"index":{"_id":2}}
    {"id":"2","datapoint_id":"2","datetime":"1577833210000","value":"51"}
    {"index":{"_id":3}}
    {"id":"3","datapoint_id":"2","datetime":"1577833220000","value":"77"}

```

What i want expressed in sql:

```auto
    select datapoint_id, 
    group_concat(`datetime` order by `datetime` SEPARATOR ',' limit 5) as dt, 
    group_concat(`value` order by `datetime` SEPARATOR ',' limit 5) as val 
    from example_measures 
    group by datapoint_id;

```

I would like to have 2 arrays per data point. One with the timestamps and one with the values.

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [December 20, 2020, 9:15pm UTC](https://discuss.elastic.co/t/group-concat-aggragation/256285/2 "2020-12-20T21:15:44Z")

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