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

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slug: /en/sql-reference/aggregate-functions/reference/stddevpop
sidebar_position: 30
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# stddevPop

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

Alias:
- `STD`
- `STDDEV_POP`

:::note
This function uses a numerically unstable algorithm. If you need [numerical stability](https://en.wikipedia.org/wiki/Numerical_stability) in calculations, use the `stddevPopStable` function. It works slower but provides a lower computational error.
:::
Removed /ja folder, cleaned up /ru markdown 2022-04-09 13:29:05 +00:00			`---`
add slugs 2022-08-28 14:53:34 +00:00			`slug: /en/sql-reference/aggregate-functions/reference/stddevpop`
Removed /ja folder, cleaned up /ru markdown 2022-04-09 13:29:05 +00:00			`sidebar_position: 30`
			`---`

Remove H1 anchor tags from docs 2022-06-02 10:55:18 +00:00			`# stddevPop`
Removed /ja folder, cleaned up /ru markdown 2022-04-09 13:29:05 +00:00
			`The result is equal to the square root of [varPop](../../../sql-reference/aggregate-functions/reference/varpop.md).`

Add STD alias to stddevPop function for MySQL compatibility 2023-09-07 03:46:27 +00:00			`Alias:`
			- `STD`
			- `STDDEV_POP`

			`:::note`
Removed /ja folder, cleaned up /ru markdown 2022-04-09 13:29:05 +00:00			This function uses a numerically unstable algorithm. If you need [numerical stability](https://en.wikipedia.org/wiki/Numerical_stability) in calculations, use the `stddevPopStable` function. It works slower but provides a lower computational error.
			`:::`