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STNumInteriorRing (geometry Data Type)

Returns the number of interior rings of a Polygongeometry instance.


.STNumInteriorRing ( )

SQL Server return type: int

CLR return type: SqlInt32

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

The following example creates a Polygon instance and uses STNumInteriorRing() to find how many interior rings the instance has.

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.STNumInteriorRing();
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