PostGIS ST_Union

Örnek
Şöyle yaparız.

CREATE OR REPLACE VIEW _06_spildevand_vandloeb.drikkevandsledning_dissolve AS
  SELECT ROW_NUMBER() OVER() AS id, 
         ST_Union(the_geom)::GEOMETRY(MULTILINESTRING,25832) AS geom,  -- alias AS geom
         descr 
  FROM   _06_spildevand_vandloeb.ledninger_vand
  GROUP BY
         descr
;