STNumGeometries (geography Data Type)
Returns the number of geometries that make up a geography instance.
Applies to: SQL Server (SQL Server 2008 through current version), Azure SQL Database.
The following example creates a MultiPoint instance and uses STNumGeometries() to find out how many geometries the instance contains.
DECLARE @g geography; SET @g = geography::STGeomFromText('MULTIPOINT((-122.360 47.656), (-122.343 47.656))', 4326); SELECT @g.STNumGeometries();