नोट
इस पृष्ठ तक पहुंच के लिए प्राधिकरण की आवश्यकता होती है। आप साइन इन करने या निर्देशिकाएँ बदलने का प्रयास कर सकते हैं।
इस पृष्ठ तक पहुंच के लिए प्राधिकरण की आवश्यकता होती है। आप निर्देशिकाएँ बदलने का प्रयास कर सकते हैं।
Applies to: 
SQL Server
Azure SQL Database
Azure SQL Managed Instance
SQL database in Microsoft Fabric
Tests if the geography instance is the same as the specified type.
Syntax
.InstanceOf ( 'geography_type')
Arguments
geography_type
The nvarchar(4000) string specifying one of 16 types exposed in the geography type hierarchy.
Return Types
SQL Server return type: bit
CLR return type: SqlBoolean
Remarks
Returns 1 if the type of a geography instance is the same as the specified type, or if the specified type is an ancestor of the instance type; otherwise, returns 0.
This geography data type method supports FullGlobe instances or spatial instances that are larger than a hemisphere.
The input for the method must be one of these types: Geometry, Point, Curve, LineString, CircularString, Surface, Polygon, CurvePolygon, GeometryCollection, MultiSurface, MultiPolygon, MultiCurve, MultiLineString, MultiPoint, or FullGlobe.
This method throws an ArgumentException if you use any other strings for the input.
This method isn't precise.
Examples
The following example creates a MultiPoint instance and uses InstanceOf() to see whether the instance is a GeometryCollection.
DECLARE @g geography;
SET @g = geography::STGeomFromText('MULTIPOINT(-122.360 47.656, -122.343 47.656)', 4326);
SELECT @g.InstanceOf('GEOMETRYCOLLECTION');