# MV_APPEND

MV_APPEND is a function that concatenates the values of two multi-value fields.

## Syntax

`MV_APPEND(field1, field2)`

### Parameters

#### field1

The first multi-value field to be concatenated.

```esql
ROW a = ["foo", "bar"], b = ["baz", "qux"]
| EVAL c = MV_APPEND(a, b)
| KEEP a, b, c
```

```esql
ROW x = [1, 2, 3], y = [4, 5, 6]
| EVAL z = MV_APPEND(x, y)
| KEEP x, y, z
```
