On 9 March 2016 at 19:11, Markus Neteler <neteler at osgeo.org> wrote: > > > Yeah.. I think > LEFT OUTER JOIN > must be used, at least with sqlite backend. > no, the code is working quiet well, look to m other mail. it seems a column type problem -- ciao Luca http://gis.cri.fmach.it/delucchi/ www.lucadelu.org