Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
STExteriorRing (geometry Data Type)
Collapse the table of content
Expand the table of content

STExteriorRing (geometry Data Type)


Applies To: SQL Server 2014, SQL Server 2016 Preview

Returns the exterior ring of a geometry instance that is a polygon.

Applies to: SQL Server (SQL Server 2008 through current version), Azure SQL Database.

.STExteriorRing ( )

SQL Server return type: geometry

CLR return type: SqlGeometry

Open Geospatial Consortium (OGC) type: LineString

This method returns null if the geometry instance is not a polygon.

The following example creates a Polygon instance and uses STExteriorRing() to return the exterior ring of the polygon as a LineString.

DECLARE @g geometry;
SET @g = geometry::STGeomFromText('POLYGON((0 0, 3 0, 3 3, 0 3, 0 0),(2 2, 2 1, 1 1, 1 2, 2 2))', 0);
SELECT @g.STExteriorRing().ToString();

Community Additions

© 2015 Microsoft