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28 lines
668 B
Markdown
28 lines
668 B
Markdown
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---
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toc_priority: 151
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---
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# skewSamp {#skewsamp}
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Computes the [sample skewness](https://en.wikipedia.org/wiki/Skewness) of a sequence.
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It represents an unbiased estimate of the skewness of a random variable if passed values form its sample.
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``` sql
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skewSamp(expr)
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```
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**Parameters**
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`expr` — [Expression](../../../sql-reference/syntax.md#syntax-expressions) returning a number.
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**Returned value**
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The skewness of the given distribution. Type — [Float64](../../../sql-reference/data-types/float.md). If `n <= 1` (`n` is the size of the sample), then the function returns `nan`.
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**Example**
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``` sql
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SELECT skewSamp(value) FROM series_with_value_column
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```
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