# ISNULL

Returns true if the value is NULL.

## Syntax

```sql
ISNULL (val)
(val IS NULL)

```

## Arguments

* val: any object

## Return Type

Boolean

## Examples

```sql
SELECT ISNULL(NULL), ISNULL(0), (NULL + 0 is NULL), (0 is NULL);

```

```output

+--------------+-----------+--------------------+-------------+
| ISNULL(NULL) | ISNULL(0) | (NULL + 0 is NULL) | (0 is NULL) |
+--------------+-----------+--------------------+-------------+
|            1 |         0 |                  1 |           0 |
+--------------+-----------+--------------------+-------------+

```

***

Modified at: February 24, 2023

Source: [/db/v9.1/reference/sql-reference/conditional-functions/isnull/](https://docs.singlestore.com/db/v9.1/reference/sql-reference/conditional-functions/isnull/)

(An index of the documentation is available at /llms.txt)