你当前正在访问 Microsoft Azure Global Edition 技术文档网站。 如果需要访问由世纪互联运营的 Microsoft Azure 中国技术文档网站,请访问 https://docs.azure.cn。
stdevif() (aggregation function)
Applies to: ✅ Microsoft Fabric ✅ Azure Data Explorer ✅ Azure Monitor ✅ Microsoft Sentinel
Calculates the standard deviation of expr in records for which predicate evaluates to true
.
Null values are ignored and don't factor into the calculation.
Note
This function is used in conjunction with the summarize operator.
Syntax
stdevif(
expr,
predicate)
Learn more about syntax conventions.
Parameters
Name | Type | Required | Description |
---|---|---|---|
expr | string |
✔️ | The expression used for the standards deviation aggregation calculation. |
predicate | string |
✔️ | The predicate that has to evaluate to true in order for expr to be added to the result. |
Returns
Returns the standard deviation value of expr in records for which predicate evaluates to true
.
Example
The following example shows the standard deviation in a range of 1 to 100.
range x from 1 to 100 step 1
| summarize stdevif(x, x % 2 == 0)
Output
stdevif_x |
---|
29.1547594742265 |