# NQL logical operators

Use logical operators with [NQL where](/platform/understanding-key-data-platform-concepts/nexthink-query-language-nql/nql-keywords/nql-where.md) clause to filter your NQL query results.

### NQL 'in'

Use the `in` logical operator to check if a metric value is in the list.

**Examples**:

{% code overflow="wrap" lineNumbers="true" %}

```
...
| where package.name in [ "MS Teams", "Zoom" ]
```

{% endcode %}

{% code overflow="wrap" lineNumbers="true" %}

```
...
| where code in [94011, 94031]
```

{% endcode %}

### NQL '!in'

Use the `!in` logical operator to check if a metric value is **not** in the list.

**Examples**:

{% code overflow="wrap" lineNumbers="true" %}

```
...
| where hardware.type !in [virtual, null]
```

{% endcode %}

{% code overflow="wrap" lineNumbers="true" %}

```
...
| where code !in [ 403, 404]
```

{% endcode %}

### NQL 'contains'

Use the `contains` logical operator to check if a string is contained in an array of strings.

**Example**:

{% code overflow="wrap" lineNumbers="true" %}

```
...
| where monitor.tags contains 'VDI'
```

{% endcode %}

### NQL '!contains'

Use the `!contains` logical operator to check if a string is **not** contained in an array of strings.

**Example**:

{% code overflow="wrap" lineNumbers="true" %}

```
...
| where monitor.tags !contains 'VDI'
```

{% endcode %}


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.nexthink.com/platform/understanding-key-data-platform-concepts/nexthink-query-language-nql/nql-operators/nql-logical-operators.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.