Hi Moritz, As I am using dbf, with v.db.addcol + v.db.update it is running find.
Thanks! milton 2009/7/2 Moritz Lennert <mlenn...@club.worldonline.be> > On 02/07/09 18:52, Milton Cezar Ribeiro wrote: > >> Dear all, >> I just imported a shapefile on GRASS, and I need to convert several >> fields from CHAR to numeric (double precision) - at my own risk, of course. >> Can I do it on grass, or I need to redo the thinks on arcgis ?! >> > > Depends on your database backend. In PostgreSQL (and perhaps SQLite), you > could do something like this: > > echo "alter table XYZ alter column ABC type numeric" | db.execute > > I don't think anything like this would be possible in dbf... > > You could also try a combination of v.db.addcol + v.db.update to create new > numeric columns and set the value of these columns to the value of the > varchar column. > > Moritz >
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