title	description	ms.reviewer	ms.topic	ms.date
avgif() (aggregation function)	Learn how to use the avgif() function to return the average value of an expression where the predicate evaluates to true.	alexans	reference	11/16/2022

avgif() (aggregation function)

Calculates the average of expr in records for which predicate evaluates to true.

Syntax

avgif (expr, predicate)

Name	Type	Required	Description
expr	`string`	✔️	The expression used for aggregation calculation. Records with `null` values are ignored and not included in the calculation.
predicate	`string`	✔️	The predicate that if true, the expr calculated value will be added to the average.

Returns the average value of expr in records where predicate evaluates to true.

This example calculates the average damage by state in cases where there was any damage.

[!div class="nextstepaction"] Run the query

StormEvents
| summarize Averagedamage=tolong(avg( DamageCrops)),AverageWhenDamage=tolong(avgif(DamageCrops,DamageCrops >0)) by State

The results table shown includes only the first 10 rows.