---
title: ES|QL CONCAT function
description: 
url: https://www.elastic.co/elastic/docs-builder/docs/3028/reference/query-languages/esql/functions-operators/string-functions/concat
products:
  - Elasticsearch
---

# ES|QL CONCAT function
## Syntax

![Embedded](https://www.elastic.co/elastic/docs-builder/docs/3028/reference/query-languages/esql/images/functions/concat.svg)


## Parameters

<definitions>
  <definition term="string1">
    Strings to concatenate.
  </definition>
  <definition term="string2">
    Strings to concatenate.
  </definition>
</definitions>


## Description

Concatenates two or more strings.

## Supported types


| string1 | string2 | result  |
|---------|---------|---------|
| keyword | keyword | keyword |
| keyword | text    | keyword |
| text    | keyword | keyword |
| text    | text    | keyword |


## Example

```esql
FROM employees
| KEEP first_name, last_name
| EVAL fullname = CONCAT(first_name, " ", last_name)
```


| first_name:keyword | last_name:keyword | fullname:keyword   |
|--------------------|-------------------|--------------------|
| Alejandro          | McAlpine          | Alejandro McAlpine |
| Amabile            | Gomatam           | Amabile Gomatam    |
| Anneke             | Preusig           | Anneke Preusig     |