> ## Documentation Index
> Fetch the complete documentation index at: https://private-7c7dfe99-mintlify-8a08bda2.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

> 数列の歪度を計算します。

# skewPop

<div id="skewPop">
  ## skewPop
</div>

導入バージョン: v20.1.0

数列の[歪度](https://en.wikipedia.org/wiki/Skewness)を計算します。

**構文**

```sql theme={null}
skewPop(expr)
```

**引数**

* `expr` — 数値を返す式。[`Expression`](/ja/reference/data-types/special-data-types/expression)

**戻り値**

指定された分布の歪度を返します。[`Float64`](/ja/reference/data-types/float)

**例**

**対称分布**

```sql title=Query theme={null}
SELECT skewPop(number) FROM numbers(100);
```

```response title=Response theme={null}
┌─skewPop(number)─┐
│               0 │
└─────────────────┘
```

**右に偏った分布**

```sql title=Query theme={null}
SELECT skewPop(x) FROM (SELECT pow(number, 2) AS x FROM numbers(10));
```

```response title=Response theme={null}
┌─────────skewPop(x)─┐
│ 0.6735701055423582 │
└────────────────────┘
```