# NQL countif()

The `countif()` function counts the number of rows that match specified criteria. It accepts extra arguments, the conditions that determine which rows to include. Provide one or more conditions using [bitwise operators](/platform/understanding-key-data-platform-concepts/nexthink-query-language-nql/nql-operators/nql-bitwise-operators.md).

The following query returns a ratio of poor calls. It includes two conditions that filter rows with either poor audio or poor video quality.

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

```
collaboration.sessions during past 24h
| summarize ratio_of_poor_calls = countif(session.audio.quality = poor or session.video.quality = poor) / count() by connection_type
```

{% endcode %}

| Connection type | Ratio of poor calls |
| --------------- | ------------------- |
| Ethernet        | 0                   |
| Wi-Fi           | 0.01                |
| Cellular        | 0.13                |


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