![]() ![]() Fields and geometry are from the features on the joined layer. ![]() Order_by - optional filter expression to order the features used for calculating the aggregate. The source feature can be accessed with the variable - optional string to use to join values for ‘concatenate’ and ‘concatenate_unique’ aggregates Valid options are:Ĭoncatenate: join strings with a concatenatorĬoncatenate_unique: join unique strings with a concatenatorĬollect: create an aggregated multipart geometryĪrray_agg: create an array of aggregated valuesĮxpression - sub expression or field name to aggregateįilter - optional filter expression to limit the features used for calculating the aggregate. Layer - a string, representing either a layer name or layer IDĪggregate - a string corresponding to the aggregate to calculate. Returns an aggregate value calculated using features from another layer.Īggregate(layer, aggregate, expression,, , )
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