varianceif() (aggregation function)
Applies to: ✅ Azure Data Explorer ✅ Azure Monitor ✅ Microsoft Sentinel
Calculates the variance 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
varianceif(expr, predicate)
Learn more about syntax conventions.
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
| expr | string |
✔️ | The expression to use for the variance calculation. |
| predicate | string |
✔️ | If predicate evaluates to true, the expr calculated value will be added to the variance. |
Returns
Returns the variance value of expr in records for which predicate evaluates to true.
Example
range x from 1 to 100 step 1
| summarize varianceif(x, x%2 == 0)
Output
| varianceif_x |
|---|
| 850 |