I've got a simple problem: I want to count the number of points within a
set of polygons.
I have a SQL already but it only gives back the gid of the polygone that
actually contains points.
My tables: a polygon layer with 19.000 rows and a point layer with 450 rows.
The following SQL
|select grid.gid, count(*) AS totale FROM grid, kioskdhd3 WHERE
st_contains(grid.geom,kioskdhd3.geom) GROUP BY grid.gid;
|
return only some 320 polygons that actually contain points. But I want
all polygons returned, even thought the number of points is 0.
Of course it has to do with my WHERE-clause. Where do I have to put in
my st_contains?
Thank you Carsten
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