ClickHouse/docs/en/sql-reference/aggregate-functions/reference/stddevsamp.md

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# stddevSamp

The result is equal to the square root of [varSamp](../../../sql-reference/aggregate-functions/reference/varsamp.md).

:::note    
This function uses a numerically unstable algorithm. If you need [numerical stability](https://en.wikipedia.org/wiki/Numerical_stability) in calculations, use the `stddevSampStable` function. It works slower but provides a lower computational error.
:::
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			`The result is equal to the square root of [varSamp](../../../sql-reference/aggregate-functions/reference/varsamp.md).`

			`:::note`
			This function uses a numerically unstable algorithm. If you need [numerical stability](https://en.wikipedia.org/wiki/Numerical_stability) in calculations, use the `stddevSampStable` function. It works slower but provides a lower computational error.
			`:::`