sumif() (aggregation function)

Returns the sum of Expr in records for which Predicate evaluates to true.

• Can be used only in context of aggregation inside summarize

You can also use the sum() function, which sums rows without predicate expression.

Syntax

sumif (Expr,Predicate)

Arguments

• Expr: expression for aggregation calculation.
• Predicate: predicate that, if true, the Expr's calculated value will be added to the sum.

Returns

The sum value of Expr for which Predicate evaluates to true.

Example

let T = datatable(name:string, day_of_birth:long)
[
   "John", 9,
   "Paul", 18,
   "George", 25,
   "Ringo", 7
];
T
| summarize sumif(day_of_birth, strlen(name) > 4)