> For the complete documentation index, see [llms.txt](https://docs.nexthink.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.nexthink.com/platform/ja/understanding-key-data-platform-concepts/nexthink-query-language-nql/nql-functions/nql-countif.md).

# NQL countif()

`countif()` 関数は、指定された条件に一致する行の数をカウントします。この関数は、どの行を含めるかを決定する条件として、追加の引数を受け入れます。[ビット単位演算子](/platform/ja/understanding-key-data-platform-concepts/nexthink-query-language-nql/nql-operators/nql-bitwise-operators.md)を使用して、1つ以上の条件を指定してください。

以下のクエリは、劣悪な通話の比率を返します。このクエリには、音声またはビデオの品質が劣悪な行をフィルタリングする2つの条件が含まれています。

{% 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 %}

| 接続タイプ  | 劣悪な通話の比率 |
| ------ | -------- |
| イーサネット | 0        |
| Wi-Fi  | 0.01     |
| 携帯電話   | 0.13     |


---

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