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

> 计算一个序列的峰度。

# kurtPop

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

引入版本：v20.1.0

计算序列的 [峰度](https://en.wikipedia.org/wiki/Kurtosis)。

**语法**

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

**参数**

* `expr` — 返回数值的[表达式](/zh/reference/syntax#expressions)。[`(U)Int*`](/zh/reference/data-types/int-uint) 或 [`Float*`](/zh/reference/data-types/float) 或 [`Decimal`](/zh/reference/data-types/decimal)

**返回值**

返回给定分布的峰度。[`Float64`](/zh/reference/data-types/float)

**示例**

**计算峰度**

```sql title=Query theme={null}
CREATE TABLE test_data (x Float64) ENGINE = Memory;
INSERT INTO test_data VALUES (1), (2), (3), (4), (5), (6), (7), (8), (9), (10);

SELECT kurtPop(x) FROM test_data;
```

```response title=Response theme={null}
┌─────────kurtPop(x)─┐
│ 1.7757575757575756 │
└────────────────────┘
```