STWithin (geometry Data Type)

 

THIS TOPIC APPLIES TO:yesSQL Server (starting with 2008)yesAzure SQL DatabasenoAzure SQL Data Warehouse noParallel Data Warehouse

Returns 1 if a geometry instance is completely within another geometry instance; otherwise, returns 0.

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

other_geometry
Is another geometry instance to compare against the instance on which STWithin() is invoked.

SQL Server return type: bit

CLR return type: SqlBoolean

This method always returns null if the spatial reference IDs (SRIDs) of the geometry instances do not match.

The following example uses STWithin() to test two geometry instances to see if the first instance is completely within the second instance.

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

Spatial Indexes Overview
OGC Methods on Geometry Instances

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