Not
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The longitude property of the geography instance.
Syntax
.Long
Return Value
SQL Server type: float
CLR type: SqlDouble
Remarks
In the OpenGIS model, Long is defined only on geography instances composed of a single point. This property will return NULL if geography instances contain more than a single point. This property is precise and read-only.
Examples
This example creates a Point instance and retrieves the longitude of the point.
DECLARE @g geography;
SET @g = geography::STGeomFromText('POINT(-122.34900 47.65100)', 4326);
SELECT @g.Long;