# Cardinality aggregation on several fields

**URL:** <https://discuss.elastic.co/t/cardinality-aggregation-on-several-fields/34519>\
**Category:** Elasticsearch\
**Created:** [November 13, 2015, 2:13pm UTC](https://discuss.elastic.co/t/cardinality-aggregation-on-several-fields/34519 "2015-11-13T14:13:11Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Nicolas\_Genain](https://avatars.discourse-cdn.com/v4/letter/n/46a35a/32.png) [@Nicolas\_Genain](https://discuss.elastic.co/u/Nicolas_Genain)\
**Post date:** [November 13, 2015, 2:13pm UTC](https://discuss.elastic.co/t/cardinality-aggregation-on-several-fields/34519/1 "2015-11-13T14:13:11Z")

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Hi,

I would like to count the discinct elements on the combination of two disctinct fields but the cardinality aggregation only accepts one field. Do you know how I could work my way around this without reindexing the whole index?

Thanks

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<div class="post-metadata">

**Author:** ![colings86](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/colings86/32/44960_2.png) [@colings86](https://discuss.elastic.co/u/colings86)\
**Post date:** [November 13, 2015, 2:33pm UTC](https://discuss.elastic.co/t/cardinality-aggregation-on-several-fields/34519/2 "2015-11-13T14:33:04Z")

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You could use a script in the cardinality aggregation to add the values for each of the fields to an array and return the array. See the following for a simple example of this:

```auto
PUT test/doc/1
{
  "field1": "value1",
  "field2": "value2"
}
PUT test/doc/2
{
  "field1": "value2",
  "field2": "value3"
}
PUT test/doc/3
{
  "field1": "value1",
  "field2": "value3"
}
PUT test/doc/4
{
  "field1": "value3",
  "field2": "value4"
}

GET test/_search
{
  "size": 0,
  "aggs": {
    "cardinality": {
      "cardinality": {
        "script": {
          "inline": "[doc['field1'].value, doc['field2'].value ]"
        }
      }
    }
  }
}

```

---

<div class="post-metadata">

**Author:** ![Nicolas\_Genain](https://avatars.discourse-cdn.com/v4/letter/n/46a35a/32.png) [@Nicolas\_Genain](https://discuss.elastic.co/u/Nicolas_Genain)\
**Post date:** [November 17, 2015, 2:07pm UTC](https://discuss.elastic.co/t/cardinality-aggregation-on-several-fields/34519/3 "2015-11-17T14:07:46Z")

</div>

Worked great, thanks!

---

<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:** [July 5, 2017, 11:37pm UTC](https://discuss.elastic.co/t/cardinality-aggregation-on-several-fields/34519/4 "2017-07-05T23:37:56Z")

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