In my SQL Server (2008 R2) on Azure, there's a table containing a lot of geographical Points
(latitude/longitude):
CREATE TABLE MyPoints
(
Region uniqueidentifier NOT NULL,
Number int NOT NULL,
Position geography NOT NULL,
CONSTRAINT PK_MyPoints PRIMARY KEY(Region, Number)
)
Now I want to create a Polygon
from this points to determine, which of my stores are located in the area defined by the points.
Is there a native and fast way to build a polygon from the given points in T-SQL? The solutions I found are using the STGeomFromText
/STGeomFomWKB
methods to create a polygon, which seems very cumbersome and slow to me.
Something like:
SET @POLY = geometry::STPolyFromPoints(SELECT Position FROM MyPoints)
As far as I know, there is no native function that takes a table as parameter and converts that to a polygon.
Your best is to combine a scalar User Defined Function to concatenate a column of results into a single comma seperated string with the STPolyFromText that you have already read about.