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* prefer relative links from root * wip * split aggregate function reference * split system tables
45 lines
999 B
Markdown
45 lines
999 B
Markdown
---
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toc_priority: 107
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---
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# avgWeighted {#avgweighted}
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Calculates the [weighted arithmetic mean](https://en.wikipedia.org/wiki/Weighted_arithmetic_mean).
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**Syntax**
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``` sql
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avgWeighted(x, weight)
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```
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**Parameters**
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- `x` — Values. [Integer](../../../sql-reference/data-types/int-uint.md) or [floating-point](../../../sql-reference/data-types/float.md).
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- `weight` — Weights of the values. [Integer](../../../sql-reference/data-types/int-uint.md) or [floating-point](../../../sql-reference/data-types/float.md).
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Type of `x` and `weight` must be the same.
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**Returned value**
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- Weighted mean.
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- `NaN`. If all the weights are equal to 0.
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Type: [Float64](../../../sql-reference/data-types/float.md).
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**Example**
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Query:
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``` sql
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SELECT avgWeighted(x, w)
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FROM values('x Int8, w Int8', (4, 1), (1, 0), (10, 2))
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```
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Result:
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``` text
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┌─avgWeighted(x, weight)─┐
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│ 8 │
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└────────────────────────┘
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```
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