# Update by query, values from another index

**URL:** <https://discuss.elastic.co/t/update-by-query-values-from-another-index/303608>\
**Category:** Elasticsearch\
**Created:** [April 29, 2022, 1:44pm UTC](https://discuss.elastic.co/t/update-by-query-values-from-another-index/303608 "2022-04-29T13:44:37Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![save4elastic](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/save4elastic/32/92180_2.png) [@save4elastic](https://discuss.elastic.co/u/save4elastic)\
**Post date:** [April 29, 2022, 1:44pm UTC](https://discuss.elastic.co/t/update-by-query-values-from-another-index/303608/1 "2022-04-29T13:44:38Z")

</div>

I have an index with values like

```auto
FIRST_INDEX (10 billion entries)
{
id: 123,
car: "Volvo"
},
{
id: 124,
car: "Vaneo"
}

```

The goal is to fill the above FIRST\_INDEX with values from the SECOND\_INDEX.

```auto
SECOND_INDEX (1 million entries)
{
car: "Volvo"
doors: "4"
},
{
car: "Vaneo"
doors: "6"
}

```

How do I update FIRST\_INDEX with values of doors from the second index? Can I do an update by query and keep this within Elasticsearch?

Final output

```auto
FIRST_INDEX (10 billion entries, with new entries)
{
id: 123,
car: "Volvo",
doors: "4"
},
{
id: 124,
car: "Vaneo",
doors: "6"
}

```

---

<div class="post-metadata">

**Author:** ![spinscale](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/spinscale/32/25011_2.png) [@spinscale](https://discuss.elastic.co/u/spinscale)\
**Post date:** [April 29, 2022, 3:34pm UTC](https://discuss.elastic.co/t/update-by-query-values-from-another-index/303608/2 "2022-04-29T15:34:45Z")

</div>

Maybe (hard to tell without further details) having an enrich processor could help you in this case. See [Enrich your data | Elasticsearch Guide [8.1] | Elastic](https://www.elastic.co/guide/en/elasticsearch/reference/8.1/ingest-enriching-data.html) for more

---

<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:** [May 27, 2022, 3:35pm UTC](https://discuss.elastic.co/t/update-by-query-values-from-another-index/303608/3 "2022-05-27T15:35:08Z")

</div>

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