STGeometryN (geography Data Type)
Applies to: SQL Server (all supported versions) Azure SQL Database Azure SQL Managed Instance
Returns a specified geography element in a GeometryCollection or one of its subtypes. When STGeometryN() is used on a subtype of a GeometryCollection, such as MultiPoint or MultiLineString, this method returns the geography instance if called with N=1.
.STGeometryN ( expression )
To view Transact-SQL syntax for SQL Server 2014 and earlier, see Previous versions documentation.
Is an int expression between 1 and the number of geography instances in the GeometryCollection.
SQL Server return type: geography
CLR return type: SqlGeography
This method returns null if the parameter is larger than the result of STNumGeometries() and will throw an ArgumentOutOfRangeException if the expression parameter is less than 1.
The following example creates a
MultiPoint``geography instance and uses
STGeometryN() to find the second
geography instance of the GeometryCollection.
DECLARE @g geography; SET @g = geography::STGeomFromText('MULTIPOINT(-122.360 47.656, -122.343 47.656)', 4326); SELECT @g.STGeometryN(2).ToString();