# First

> Supported in: Batch, Faster, Streaming

First item in the group. Note, if used within an aggregate or unordered window, the row selected will be non-deterministic.

**Expression categories:** Aggregate

## Declared arguments

* **Expression:** Expression to aggregate.<br>*Expression\<T>*
* **Ignore nulls:** If true, null values will be ignored.<br>*Literal\<Boolean>*

**Type variable bounds:** *T accepts AnyType*

**Output type:** *T*

## Examples

### Example 1: Base case

**Argument values:**

* **Expression:** `values`
* **Ignore nulls:** false

**Given input table:**

| values |
| ----- |
| *null* |
| 2 |
| 4 |
| 3 |

**Outputs:** *null*

***

### Example 2: Base case

**Argument values:**

* **Expression:** `values`
* **Ignore nulls:** true

**Given input table:**

| values |
| ----- |
| *null* |
| 2 |
| 4 |
| 3 |

**Outputs:** 2

***