59 lines
1.3 KiB
Markdown
59 lines
1.3 KiB
Markdown
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## `MEDIAN` [esql-median]
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**Syntax**
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:::{image} ../../../../../images/median.svg
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:alt: Embedded
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:class: text-center
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:::
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**Parameters**
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true
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**Description**
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The value that is greater than half of all values and less than half of all values, also known as the 50% [`PERCENTILE`](../../esql-functions-operators.md#esql-percentile).
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::::{note}
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Like [`PERCENTILE`](../../esql-functions-operators.md#esql-percentile), `MEDIAN` is [usually approximate](../../esql-functions-operators.md#esql-percentile-approximate).
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::::
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**Supported types**
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| number | result |
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| --- | --- |
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| double | double |
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| integer | double |
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| long | double |
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**Examples**
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```esql
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FROM employees
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| STATS MEDIAN(salary), PERCENTILE(salary, 50)
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```
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| MEDIAN(salary):double | PERCENTILE(salary, 50):double |
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| --- | --- |
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| 47003 | 47003 |
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The expression can use inline functions. For example, to calculate the median of the maximum values of a multivalued column, first use `MV_MAX` to get the maximum value per row, and use the result with the `MEDIAN` function
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```esql
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FROM employees
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| STATS median_max_salary_change = MEDIAN(MV_MAX(salary_change))
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```
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| median_max_salary_change:double |
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| --- |
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| 7.69 |
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::::{warning}
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`MEDIAN` is also [non-deterministic](https://en.wikipedia.org/wiki/Nondeterministic_algorithm). This means you can get slightly different results using the same data.
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::::
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