@Anna123
**
so something like:
select row_number() over(order by geom)::integer as no,
ST_Union(ST_Buffer(geom,500) ) as geom from public.mytable group by geom;
should also work.
yes, this work, but I loose the union process and I get a buffer for each
feature in mytab
Hi Pietro,
I had the same in a project with a view. Solved it by using the function
row_number which can be used as long as it is a usual integer:
CREATE OR REPLACE VIEW cadastre.districtviewAS
SELECT row_number() OVER (ORDER BY d.gid)::integer AS no,
d.districtcode, d.geom, count(p.gid) asc
Hi Pietro,
what I do in similar cases (creating Views, not sure if it works with
SQL layer) is:
SELECT min(my_pk_column), ST_Union(ST_Buffer(geom,500) as geom FROM
public.mytable
Bernhard
Am 07.11.2012 08:38, schrieb Pietro Rossin:
Hi all
I tried to load in Qgis, by using fast SQL layer, a
Hi all
I tried to load in Qgis, by using fast SQL layer, a query like this:
SELECT (select ST_Union(ST_Buffer(geom,500)) FROM public.mytable) as geom;
This query make a buffer of the features in mytable and union them in a
single polygon (if contiguous).
It works in pgadmin and in openjump but
