SQL:बहुभुजों का संघ

SQL सर्वर 2012 में:

SELECT geometry::UnionAggregate(geomcolumn) FROM YourTable;

SQL सर्वर 2008/R2 में:

DECLARE @g = geometry::STGeomFromText('GEOMETRYCOLLECTION EMPTY', YourSRID);
SELECT @g = @g.STUnion(geomcolum) FROM YourTable;