STEndPoint (geography Data Type)
Applies to: 
SQL Server
Azure SQL Database
Azure SQL Managed Instance
Returns the end point of a geography instance.
Syntax
.STEndPoint ( )
Return Types
SQL Server return type: geography
CLR return type: SqlGeography
Open Geospatial Consortium (OGC) type: Point
Remarks
STEndPoint() is the equivalent of STPointN(x.STNumPoints``()).
This method returns null if called on an empty geography instance.
Examples
The following example creates a LineString instance with STGeomFromText() and uses STEndPoint() to retrieve the end point of the LineString.
DECLARE @g geography;
SET @g = geography::STGeomFromText('LINESTRING(-122.360 47.656, -122.343 47.656)', 4326);
SELECT @g.STEndPoint().ToString();