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sum() (aggregation function)

  • Article

Calculates the sum of expr across the group.

Null values are ignored and don't factor into the calculation.

Note

This function is used in conjunction with the summarize operator.

Syntax

sum(expr)

Learn more about syntax conventions.

Parameters

Name Type Required Description
expr string ✔️ The expression used for the aggregation calculation.

Returns

Returns the sum value of expr across the group.

Example

This example returns the total number of deaths by state.

Run the query

StormEvents 
| summarize EventCount=count(), TotalDeathCases = sum(DeathsDirect) by State 
| sort by TotalDeathCases

Output

The results table shown includes only the first 10 rows.

State event_count TotalDeathCases
TEXAS 4701 71
FLORIDA 1042 57
CALIFORNIA 898 48
ILLINOIS 2022 29
ALABAMA 1315 29
MISSOURI 2016 20
NEW YORK 1750 19
KANSAS 3166 17
GEORGIA 1983 17
TENNESSEE 1125 17
... ... ...