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sum

Create an AggregateField object that can be used to compute the sum of a specified field over a range of documents in the result set of a query.

function sum(field: string | FieldPath): AggregateField<number>;

sum(field: string | FieldPath): AggregateField<number>

§Parameters

field: string | FieldPath

Specifies the field to sum across the result set.

§Return Type

AggregateField<number>