CollectionAggregate (geography Data Type)

Creates a GeometryCollection instance from a set of geography objects.

Składnia

ConvexHullAggregate ( geography_operand )

Arguments

• geography_operand
  Is a geography type table column that represents a set of geography objects to be listed in the GeometryCollection instance.

Return Types

SQL Server return type: geography

Exception

Throws a FormatException when there are input values that are not valid. See STIsValid (geography Data Type)

Uwagi

Method returns null when the input is empty or the input has different SRIDs. See Spatial Reference Identifiers (SRIDs)

Method ignores null inputs.

[!UWAGA]

Method returns null if all inputted values are null.

Examples

The following example returns a GeometryCollection instance that contains a set of geography objects.

USE AdventureWorks2012

GO

SELECT geography::CollectionAggregate(SpatialLocation).ToString() AS SpatialLocation

FROM Person.Address

WHERE City LIKE ('Bothell')

Zobacz także

Inne zasoby

Extended Static Geography Methods